Top 7 Allergies That Cause Hair Loss (+7 Solutions)

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

Is your hair falling out without any explanation? You tried to investigate and you still can’t find the cause?

Well – have you thought about allergies?

It might sound funny, but allergies can cause hair loss themselves:

  • make your scalp really itchy
  • weaken the hair follicles 

So if your think this might be your case, here are 7 different allergies that cause hair loss. You might have one of them.


What You Will Find In This Article

I would divide the following lines in 4 chapters:

    1. How Can Allergies Affect Hair
    2. Top 7 Allergies That Cause Hair Loss
    3. 7 Solutions You Might Use
    4. My Final Verdict

So first of all – let’s see how exactly can an allergy harm your hair.


#1 – How Can Allergies Affect Hair?

First of all – an allergy is your body’s immune response. 

So it’s not a certain food/product being allergic – it’s how your body sees it.

Now – let’s take a random case using a common allergy:

Case 1 – You’re allergic to strawberries and your skin gets itchy whenever you consume those. How could this affect your hair?

  1. Normally – it shouldn’t.
  2. Most allergy cause skin rashes, not scalp rashes (unless they’re really severe).
  3. If you scalp isn’t affected – your hair will be fine.

Case 2 – Now, let’s say you eat some strawberries and you get a severe allergic reactions (your scalp also gets itchy).

Could this harm your hair? It’s possible:

  1. The allergic reaction stimulates inflammatory molecules.
  2. They cause chronic inflammation throughout the body.
  3. Your hair roots are also affected
  4. Besides, an allergy causes excessive scratching.
  5. In this way, you will weaken your hair roots. [1]
  6. Also, your hair follicles can also suffer from malnutrition. 

But as I said – these cases are pretty rare. 

On the other hand – if you’re allergic to a hair dye or scalp product, your hair might be seriously affected.

Conclusion: Food allergies rarely affect the hair, because they usually appear on the skin (not on the scalp).

However – allergies to scalp/hair products can cause serious damage (depending on how severe they are).


#2 – 7 Usual Allergies That Affect Hair

As I said – it’s pretty rare, but some allergies can make your hair fall out. Or at least weaken it. 

So if you can’t find a cause for your hair loss, this might be the explanation.

That’s why I recommend you to check this list closely and see whether you recognize any symptom or not.

Note: There are several allergies that can cause hair loss, but they’re very rare. The ones below are by far the most common ones (over 75% of cases).


1. Hair Dye

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

That’s probably the most common allergy that affects the hair.

So if that’s your case – you’re probably not allergic to the substance itself, but to one of its chemicals.

1. How It Affects Hair

Most of the symptoms are local – so they’re usually not very severe:

  • contact dermatitis
  • itching
  • small red patches

In case your allergy is more severe, you can also experience eye swelling or itching.

So hair loss is extremely rare (and only if your allergy is really severe). [2]

How can you recognize hair dye allergy? It’s simple – hair dye allergy always appears short after you had your hair dyed.

So if you dyed your hair last week and you started getting these symptoms yesterday – it’s surely not because of the hair dye.

2. Solutions

That really depends on how severe is your allergy.

  1. Wash the affected are with cold water immediately.
  2. Rinse several times.
  3. Use a gentle towel to remove any left dye.
  4. If you also experience symptoms in your face, seek medical attention immediately.

In most cases, the allergy is minor – meaning that it only makes your scalp itchy.

So there are few chances that it affects your hair (unless it’s severe).

The only recommendation I have is to use a natural hair dye next time – coffee is a great way to get a darker color naturally.


2. Molds

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

This allergy is another serious cause of hair loss – plus, it’s really common.

So when does it come up? In most cases, if you live in a place with mold problems.

1. How It Affects Hair

Compared to hair dye, mold allergy has bigger consequences:

  1. Produces a general allergy and inflammation.
  2. Decreases hair nourishment. 
  3. Weakens hair all over the scalp (in time).

Basically – mold allergy causes chronic inflammation, so your hair follicles start receiving less nutrients over time.

So if you’re allergic to molds, your hair could suffer really badly.

How can you recognize mold allergy? Usually – you also get itchy skin, sore eyes or cough.

Regarding your hair, the whole scalp will be affected. So you won’t get any bald spots – but a general hair loss.

2. Solutions

The major thing is to find out if there’s a mold problem in your house.

If it is – getting rid of it should solve your allergy. 

Other than that, there’s nothing else to do – except for waiting. If that was the only problem, your hair will recover shortly.


3. Hair Products

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

This could involve any products you use for your hair – from conditioners to volume sprays.

However, hairspray and mousse are the most common culprits.

1. How It Affects Hair

Most of the times – this allergy only produces itching.

So the cases when it caused hair loss are extremely rare.

However, being allergic to certain hair products can weaken your hair:

  • dehydrates the ends
  • makes your hair more fragile
  • it starts to break off easily

When it comes to hairsprays – it’s their smell that might cause an allergic reaction.

But in this case, your hair shouldn’t be affected too much.

2. Solutions

It’s quite simple – stop using that product.

However – there’s something to keep this in mind: you may be allergic to certain brands but tolerate others well enough.

So if you have an allergy to a hair mousse, just try another brand. You will probably not have any issue using it.


4. Dairy

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

Milk and other dairy can cause hair loss to people allergic to lactose.

Though it’s not a common situation, it might happen.

1. How It Affects Hair

First of all – you must be allergic to lactose. Otherwise, this won’t affect you.

So in case you are – consuming lactose-rich foods (like dairy) will cause chronic inflammation:

  • your hair follicles won’t receive enough nutrients
  • the ends will start getting more fragile

Obviously – this won’t happen overnight. 

In fact – hair loss isn’t a common symptom of lactose intolerance/allergy. But it can be a consequence. 

2. Solutions

If you think you might be allergic to lactose but you’re not sure – see a doctor and have a test.

In case you’re not allergic, this isn’t causing your hair loss. So you need to dig deeper.

But if you have a lactose allergy – simply giving up dairy and similar foods should solve the problem.

Your doctor could tell you more on this.


 5. Shampoos

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

Just like hair dye, certain shampoos can irritate your scalp really badly.

In fact – sometimes they can even cause you an allergic reaction (usually because of some of the compounds).

1. How It Affects Hair

As I said – this allergy is similar to the one with hair dye. 

However, it’s a lot more rare. I personally never developed an allergy to a shampoo (but I had an allergy to hair dye).

So the symptoms are pretty similar:

  • scalp itching 
  • swelling
  • red patches

Hair loss appears quite rarely. And most of the times (in severe cases) – you get 1-2 bald patches. So it’s not a general hair loss.

But as I said, this kind of severe allergy appears extremely rarely.

So in most cases – your hair won’t be affected at all.

2. Solutions

If your allergy isn’t too severe, you don’t have to do anything.

The symptoms will go away on their own. The only condition is to stop using that shampoo again.

Try another brand with similar ingredients and see if you have the same problems. But normally – you shouldn’t.


6. Certain Medications

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

I’m not talking about the side effects of drugs here.

So it doesn’t involve chemotherapy and other drugs that cause hair loss. [3]

Instead – it’s about being allergic to some drugs (which may harm your hair).

1. How It Affects Hair

This kind of allergy is more dangerous – because you’re taking the drugs by mouth.

Once you swallowed them, you can’t bring them back out immediately (as you can delete hair dye, for instance).

For this reason – a drug allergy can cause fast inflammation throughout your body:

  1. Itching and red spots
  2. Fever
  3. Cough

Now – taking a pill that you’re allergic to won’t make your hair fall out.

But due to chronic inflammation, it can get much weaker overtime. 

2. Solutions

If you have any small sign of itching or fever after taking a drug – consult your doctor.

Now – if it’s not a necessary drug, you can give it up anytime.

But if you’re following a long term treatment, tell your doctor about the symptoms and he should prescribe something else instead.

That should solve the problem.


7. Gluten-Rich Foods

Top 7 Allergies That Cause Hair Loss (+7 Solutions)

Gluten allergy is a really common problem nowadays – and it comes in dozens of symptoms.

Though it’s not too usual, it can also affect the hair.

1. How It Affects Hair

Firstly – you must be allergic/intolerant to gluten to experience this kind of problems.

So let’s assume you are. In this case – consuming gluten-rich foods will cause you symptoms like:

  1. Chronic inflammation
  2. Digestive problems
  3. General pain

Now – as there’s a massive inflammation throughout your body, your hair roots will also be affected.

How exactly? Well, they won’t receive the normal amount of nutrients. So overtime, they will end up breaking off and falling.

That’s why many people with gluten intolerance experience hair loss (sometimes even in patches).

2. Solutions

Most importantly – you need to see if you have a gluten intolerance/allergy or not.

In case you do, giving up every food containing gluten is essential.

It might be hard at first – but in these days, there are lots of recipes and alternative products. So it should get much easier with every year.


#3 – 7 Solutions You Might Use

So once you found your allergy – it’s time to find out how to solve it.

Now – the solution you choose depends a lot on what allergy you have (if any).

However, here are some general tips you might follow. 

Note: You can go back to the section of your allergy above, in order to see the best solution for each.

  1. Only use hair products that are chemically tested.
  2. Test your shampoo/product on your hand before using it.
  3. If your scalp gets itchy, try hard not to scratch.
  4. Check your home for mold growth and moisture.
  5. If you have a gluten/lactose allergy, respect your diet.
  6. Try to use hair products that have a natural source.
  7. Consult a doctor if your face gets swollen after using a hair product.

Obviously – these small tips won’t help considerably, because it depends a lot on the allergy you have.

But in most cases, your allergy won’t affect your hair too much.

At most – it could weaken it. But when it comes to producing hair loss, these cases are very rare. So you should feel safe.


My Verdict – Can Allergies Can Hair Loss?

Short answer: They can – but very rarely. Usually, they can only affect the hair a bit:

  • weaken the hair roots
  • make it more fragile
  • decrease hair nourishment 

So if your hair is falling out so badly and you think it might be an allergy behind – most likely, it’s not. 

Try to dig even deeper into the problem. Sometimes, it may be a scalp disorder (not a real allergy).

Other times, it may be something specific to your age

Now – if your hair loss doesn’t seem to have any real cause, here’s what you should do:

  1. Write down every symptom you have.
  2. Think about when it all started.
  3. Try to remember if any product/remedy ever helped (even temporary).
  4. See if you have anyone in your family with a similar problem.

Up next, let me know the answer to these 4 points and I will try to give you a better idea about what might be causing your hair loss.

If it’s a chronic one – it’s most likely not because of an allergy.


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4 thoughts on “Top 7 Allergies That Cause Hair Loss (+7 Solutions)

  1. Hi I dyed my hair using a L’Oreal product but had an allergic reaction within minutes, all my scalp and back of my head felt warm and red. They used the same hair dye in the salon where I first had my hair dyed but I had no problem. Could I have done something wrong?

    1. Hi Miranda. From the way you describe it, it was surely an allergic reaction. I’m not sure what you did about it, but rinsing several times with cold water is the best you can do.

      Now regarding your question – are you sure it was the very same product you used? I mean, it might have been bought from a different place, made in a different period or containing a slightly different formula. Just because it’s the same brand doesn’t mean it was exactly the same. 

      Sometimes brands use different ingredients in their products (and I’m talking mostly about additives or inactive ingredients). So my advise is to contact an allergy specialist and get tested for different allergens, so that you know exactly what substance you’re allergic to.

      Hair dye allergy can affect your scalp in severe cases – that’s why it’s important to prevent it. You can also use coffee as a natural hair dye, but it will take longer to get the same effect as with real hair dye.

      Hope this helps.

  2. Many years ago I had a severe reaction to Tylenol with codeine. I have severe itching in my scalp. A few months later I lost half of the fullness of my hair.
    Why hasn’t my hair filled back in. It is so depressing. what can i do to help my hair fill back in.

    1. Hi Kimberly, I’m not 100% sure what’s the cause but it might be the allergy. Hair changes usually appear after 2-3 months, so it makes sense that your hair started losing density after that period. Since you mentioned the allergy you had affected your scalp, there’s even higher chances that it actually affected your hair. So the allergy could be the main responsible for that.

      Now – I don’t know if you tried any product in the meantime, but here are a few things that might help:

      1. A herbal based supplement. Most are designed to grow hair faster and increase density, so if you use the right supplement you should start seeing big improvements in 3-4 months (depending on the actual product, some require a longer period to make big changes). My top recommended supplement is Folexin because it has a great formula and the lowest price out of the supplements with great results (in my case). So it’s my #1 advice for you. If you have a larger budget and you prefer a more famous brand, Nutrafol or Viviscal are some great options. Some other good supplements are Follixin, Puri Hair or Kerotin and the list could go on. The biggest difference between these products is price, some of them have really similar formulas.

      2. Topical fibers are a great aesthetic solution for hair density and fullness. I don’t have a personal favorite yet but you can find plenty of options on Amazon. Basically, you only have to apply the fibers to your scalp and your hair will look a lot fuller. It only takes 1-2 minutes and it’s really easy to do.

      3. Using Henna dye on your hair can make it look a lot thicker. That’s because the powder adds on to your hair strands and makes them look fuller (even though in reality they have the same thickness). The good part is that this herb can be used even if you don’t want to dye your hair. Just choose a shade that is close to your actual one and there shouldn’t be any change in color, only in texture.

      4. Rinsing your hair with apple cider vinegar can also make it feel harsher and thicker. It’s not as good as Henna for this, but it can help.

      These are the things I can think of right now. If there’s something else, I will let you know. I hope this helps.

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