You may have swollen armpit lumps due to infections, cysts, or vaccines. In severe cases, some armpit lumps could be a sign ...

The enlargement of your lymph nodes, cysts, infection, or irritation from shaving or deodorant use could cause a lump under your armpit. In some cases, it may indicate a serious underlying health ...

Also known as a pilonidal cyst, the condition forms when a sac of tissue fills with air or fluid in the crease of your buttocks. Pilonidal cyst, doctors say, is mostly caused by a skin infection.