You can get heat rash in your armpits when sweat glands get blocked and sweat builds up under the skin. As a result, the area becomes irritated, your skin turns red, and itchy bumps appear.

The most obvious symptom of an armpit lump is the lump itself. The lumps can range in size from very tiny to quite large. The texture of the armpit lump may vary according to what is causing it.

Irritant contact dermatitis of the armpit results in a red, inflamed ... result in red papules, bumps, or even larger boils that can be painful. The rash can also be itchy. How to treat it ...

The summer holidays are here, and so is the season for sun, sand and red itchy bumps. Dr Kingsley Chan ... These can be the elbows, neck, armpits, and where our clothes constantly rub against ...