What are big painful bumps that show up on buttocks and between legs?

The big painful bumps that show up on buttocks and between legs can be caused by several conditions:

- Folliculitis: This is a bacterial infection of the hair follicles. It can cause red, swollen, and painful bumps to appear on the skin. Folliculitis is commonly seen in areas of the body with abundant hair growth, such as the buttocks and groin.

- Hidradenitis suppurativa (HS): HS is a chronic skin condition that affects the sweat glands. It causes red, swollen, and painful bumps to develop in areas where the skin folds, such as the armpits, groin, and buttocks. HS can also lead to the formation of tunnels and tracts under the skin.

- Boils and abscesses: These are collections of pus that develop under the skin. They are caused by bacterial infections and can be quite painful. Boils and abscesses can occur anywhere on the body, but they are commonly found on the buttocks and legs.

- Pilonidal cysts: These are cysts that form in the crease between the buttocks. They are usually filled with hair, sebum, and other debris. Pilonidal cysts can become infected and painful.

- Genital warts: These are small, fleshy bumps that are caused by the human papillomavirus (HPV). They can appear on the genitals, anus, and surrounding skin. Genital warts can be painful and itchy.

If you are experiencing big painful bumps on your buttocks or between your legs, it is essential to see a healthcare professional for proper evaluation and treatment.