Underarm health, explained plainly
Your armpits sweat, smell, grow hair and sometimes get sore or lumpy. Most of this is normal, but some changes need a doctor. This site explains which is which, using NHS information.
Not medical advice. This site gives general information and is not a substitute for seeing a GP, pharmacist or other health professional. If you are worried about a symptom, get it checked. In an emergency, call 999.
Why the armpit is special
The armpit (axilla) is warm, often moist and covered with hair. It has a high number of sweat glands, including apocrine glands, which become active in puberty and produce the sweat that bacteria turn into body odour. It also has lymph nodes, small glands that are part of your immune system. Because it is an area where skin rubs against skin, it can develop rashes and infections that other places do not.
Common questions we answer
- Sweating and hyperhidrosis – when sweating is more than normal, and what NHS treatments exist.
- Body odour – why it happens and what helps.
- Antiperspirant versus deodorant – what each one does.
- Shaving rash and ingrown hairs – how to avoid razor bumps and treat them.
- Armpit lumps – what causes them and when to see a GP.
- Hidradenitis suppurativa and other skin conditions – recurring boils, intertrigo and more.
When to get help quickly
The NHS gives specific advice for each symptom, and our pages link to it. In short, get medical advice if you notice:
- A swelling in the armpit that does not go down within 2 weeks (NHS)
- A lump that feels hard or does not move when you press it
- Redness, heat, swelling and pain, which may be an infection
- Repeated painful boils or abscesses
- Sweating that is heavy, happens at night, or interferes with daily life
For urgent concerns, contact your GP, use NHS 111, or in an emergency call 999. Our page on when to see a GP has more.
Everyday care that helps
- Wash daily with mild soap and water and dry thoroughly.
- Wear breathable fabrics such as cotton, and change sweaty clothes.
- Use the right product: an antiperspirant to reduce sweat, or a deodorant to mask or reduce smell.
- Shave gently or choose another hair removal method if your skin is sensitive.
- Do not squeeze lumps or spots. That can spread infection.
How we write this site
Our health information is drawn from NHS pages that we opened and checked, which we list on each page. Medical advice changes, so check the sources for updates. We do not sell products, take affiliate commissions or recommend brands. Questions or corrections? Contact us.
Many underarm problems are embarrassing, but they are common. Doctors and pharmacists see them every day and can help without judgement.
Myths worth dropping
Body odour does not mean you are dirty, sweating does not detox the body, and shaving does not make hair grow back thicker. Sweating is a normal cooling process, and odour comes from bacteria, not the sweat itself. Antiperspirants block sweat ducts temporarily, but they do not trap toxins. If you have worries about a particular symptom, a health professional is the right person to ask.
Care routine and getting help
If you want a practical starting point, read our simple armpit care routine. If you are unsure whether a symptom needs attention, the checklist of when to see a GP sets out the signs the NHS highlights. Keep in mind that many people live with underarm problems for years before asking for help. Sweating, odour, rashes and boils are all treatable, and a short conversation with a pharmacist or GP can make a big difference. Write down your symptoms and bring any products you use. If you are a parent, remember that children and teenagers may be embarrassed, so a calm, practical approach is best.
Frequently asked questions
Is armpit sweating normal?
Yes, sweating is normal. If it is excessive, happens at night or disrupts your life, the NHS advises speaking to a GP.
When should I see a GP about an armpit lump?
The NHS says to see a GP if a swelling in the armpit has not gone down within 2 weeks. See our lump page for more.
Is this site medical advice?
No. It is general information. Speak to a health professional about your own symptoms.