An armpit lump may feel small. In other cases, it may be extremely noticeable. Seek medical attention if you have an armpit lump that gradually becomes enlarged, is or isn’t painful, or doesn ...

Painful armpit lumps are often due to a swollen axillary lymph node under the armpit. This is usually a sign that the body is fighting an infection, but it can sometimes indicate cancer. Cysts and ...

The armpit is rich in sweat glands and the pores from these can become blocked, which may go on to become infected, causing a sore lump. Many of these do eventually go on their own, so leave it ...

Painful lumps within the skin, including in your armpit, can be a sign of hidradenitis suppurativa (HS). Inflammation and infection of the sweat glands usually cause HS.

Left armpit pain can occur with conditions like allergic reactions, infections, and muscle strain. Some severe causes may have additional symptoms, including a breast lump or difficulty breathing.

There are many causes of armpit pain, from a mild muscle strain to more serious conditions like breast cancer. Learn more about causes of armpit pain in this article.

A lump or a swelling near your breasts can be alarming. An armpit lump, for instance, can be indicative of breast cancer, which is one of the most common cancers in women and occurs when cells in ...

Causes of pain under the left armpit can range from minor skin infections to nerve damage. Learn about these and other causes, and when to see a doctor.

Causes of armpit lumps include cysts, infections, and swollen lymph nodes. Although rare, a lump in the armpit may be a sign of breast cancer.