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Swollen sweat glands in the armpit are most commonly the result of blockages, inflammation, or minor bacterial infections. While conditions like Hidradenitis Suppurativa can be chronic and frustrating to manage, they are manageable with the help of a dermatologist. By paying attention to symptoms—such as the presence of pus, the firmness of the lump, and associated pain—individuals can better understand their condition and seek appropriate care.

Here’s what you need to know about why this happens and how to find relief.

If the lump is small and not causing fever, try these steps:

If the swelling is deep, firm, and pea-sized, it may be a lymph node. If the swelling is closer to the surface, red, and feels like a cyst or boil, it is likely a sweat gland issue.

A swollen sweat gland in the armpit, also known as a sweat gland abscess or hidradenitis suppurativa, occurs when one or more sweat glands in the armpit become inflamed and infected. This can cause a painful lump or nodule to form under the skin.

A swollen sweat gland (hidradenitis) usually feels like a under the skin. It may be:

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