Dark, Smelly, Sweaty or (Unwanted) Hairy Underarms? Do This!

Underarms are one of those areas patients are very conscious about, but also very embarrassed to discuss.

In clinic, I get these questions everyday;

“Doctor, why are my underarms so dark?”

“Is it because I don’t clean properly?”

“Why do my armpits smell even after bathing?”

“Why do I sweat so much?”

“Which deodorant should I use?”

“Is waxing making my underarms darker?”

“Should I do laser?”

“Are hair removal creams safe?”

“Will shaving cause more hair growth?”

So, today let me set the record straight.

Underarm darkness is more common in skin of color because we have more active melanin production, which means even small amounts of irritation can leave pigmentation behind.

Add heat, humidity, sweat, friction, obesity, tight clothing, shaving, waxing, hair removal creams, perfumes, deodorants and random fairness creams all irritate the underarm area.

The goal is to understand the cause and treat it correctly.

1. For dark underarms, first rule out acanthosis nigricans

This is very important. Acanthosis nigricans is a condition where the skin becomes darker, thicker and velvety. It commonly appears on the neck, underarms, groin, inner thighs and under the breasts.

Causes:

• insulin resistance

• weight gain

• diabetes risk

• PCOS

• metabolic syndrome

• friction

Step 1: Meet an endocrinologist or dermatologist to establish the diagnosis. In this case, a brightening cream alone will not fix the problem. You need to address the internal trigger too.

Your doctor may advise tests like fasting blood sugar, HbA1c, fasting insulin, lipid profile or PCOS evaluation depending on your history.

Step 2: Weight reduction, if advised by your doc.

Step 3: Topical treatment

• Fixderma Nigrifix Cream

• Chemist at Play 5% AHA Underarm Roll-On

• Bodywise 4% AHA BHA Underarm Roll-On

  
  

Use only 2 times a week. Do not over-exfoliate acanthosis nigricans, it WILL get darker 10 out of 10 times!

2. Dark underarms (not due to acanthosis nigricans)

First, stop calling it dirt. Dark underarms are not always because of poor hygiene.

This is one of the biggest myths.

Most people start scrubbing the area, applying lemon, baking soda, toothpaste, bleach or harsh brightening creams. And then the underarms become even darker.

Why? Because in brown skin, irritation can trigger more pigmentation.

Common causes of dark underarms include:

• friction from skin rubbing

• tight synthetic clothes

• obesity or weight gain

• repeated waxing

• shaving irritation

• hair removal creams

• perfumed deodorants

• alcohol-based sprays

• post-inflammatory pigmentation

• fungal or bacterial infection

• eczema or contact allergy

• acanthosis nigricans

• PCOS or insulin resistance

• unregulated fairness creams or steroid-mix creams

  
  

So before buying any brightening product, the first step is to figure out what is causing the pigmentation.

What to stop first if your underarms are dark

If your underarms are getting darker, stop the common irritants first.

Avoid:

• waxing

• hair removal creams

• bleaching

• scrubbing

• lemon

• baking soda

• perfume directly on underarms

• deodorants that burn

• daily acid roll-ons

• steroid-mix fairness creams

• random salon brightening creams

  
  

Most times, patients improve just by stopping the trigger.

Product options for dark underarms

Once the skin is calm, you can add gentle treatment. But please remember: don’t use everything together.

AHA/BHA underarm roll-ons

These can help with mild pigmentation, rough texture and dullness.

Options:

1. Chemist at Play 5% AHA Underarm Roll-On

2. Bodywise 4% AHA BHA Underarm Roll-On

How to use:

Use only 2 times a week at night.

Apply on clean, dry skin.

Do not apply immediately after shaving.

Do not apply on broken, itchy or irritated skin.

Do not use daily from day one.

If there is burning, redness, peeling or itching, stop. Underarm pigmentation gets worse when you irritate the skin.

Brightening creams for sensitive areas

Options:

1. Bioderma Pigmentbio Sensitive Areas

2. ACM Dépiwhite Antiblemish Cream for Sensitive & Intimate areas

These can be useful for pigmentation in body folds, including underarms, inner thighs or bikini-line areas.

How to use:

Apply a thin layer every night.

Do NOT layer with acid roll-ons on the same night initially.

A simple schedule can be:

Monday and Thursday: AHA/BHA roll-on

Other nights: pigmentation cream

Morning: gentle cleansing + deodorant/antiperspirant if needed

Also, babes! Please, don’t turn this into a 10-step underarm routine.

3. Smelly armpits

Body odor is not “sweat smell” because sweat itself is mostly odor less. The smell happens when bacteria on the skin break down sweat and secretions in the underarm area.

That is why some people bathe regularly but still get odor by afternoon. This is more common in teens due to hormonal fluctuations.

Also more common in hot and humid weather because sweat, occlusion and bacterial growth increase. So, the treatment has to target both sweat and bacteria.

Step 1: Use a deodorant or antiperspirant daily

Options (aluminium containing roll ons):

Eucerin Anti-Transpirant Roll-On (fragrance free, ideal for sensitive pits)

Uriage Power 3 Deodorant (ideal for sensitive pits)

Nivea Pearl & Beauty Roll-On

Step 2: Use benzoyl peroxide every alternate day

Benzoyl peroxide helps reduce bacteria on the skin, and works magically for body odor.

Options:

Benzac AC 5% Gel Wash

Perobar 5% Cleansing Bar

PanOxyl 10% Benzoyl Peroxide Wash

For most patients, I prefer starting with 5% benzoyl peroxide. It is effective and usually less irritating than jumping directly to 10%.

How to use:

Use in the shower.

Apply to underarms.

Leave for 1–2 minutes.

Rinse properly.

Use every alternate day.

Important: benzoyl peroxide can bleach clothes and towels, so rinse well.

Also. don’t use benzoyl peroxide right after shaving if your skin is sensitive.

Step 3: Wear breathable clothes

This sounds basic, but tight synthetic clothes trap sweat and heat. Cotton or breathable fabrics keep the area drier and reduce odor buildup.

4. Excessive underarm sweating

Some sweating is normal, especially in tropical weather.

But this may be axillary hyperhidrosis, if your underarms are wet even when you are not hot, if you sweat through clothes, avoid certain colors, carry extra shirts or feel embarrassed socially. Axillary hyperhidrosis is a medical condition.

Use an antiperspirant with aluminium:

1. Aldry Antiperspirant Lotion

2. Sweatnil Max Anti-Perspirant Roll-On

How to use:

Apply at night.

Apply only on completely dry skin.

Do not apply immediately after bathing if the area is damp.

Do not apply immediately after shaving.

Do not apply on irritated or broken skin.

Wash off in the morning if needed.

Night application works better because sweat glands are less active at night.

If your sweating is severe, Botox is a very good treatment option. Botox for underarm sweating is not the same as cosmetic Botox for wrinkles. Here, it is used medically to reduce sweat gland activity.

5. Underarm hair growth (only if its bothering you)

For underarm hair growth, trimmer and razor are 1000% better than waxing or hair removal creams.

Also, no! Razor won’t cause paradoxically hair growth.

If u want a long term semi-permanent solution, go for laser hair reduction. You could do Diode or Alexandrite or Long-pulsed Nd:YAG. Options are too many and we are spoilt for choice!

But for darker skin tones, I always prefer long-pulsed Nd:YAG.

But please don’t choose laser only based on discounts or packages. A poorly done laser can cause burns and pigmentation. So, leave the best option to your derm.

I’d just like to end this article with this. Underarm problems are not something to be embarrassed about.

Don’t randomly pick products through social media. Always first discuss with your doctor! <3