Finding a lump under your skin can be alarming, but most of the time, it’s harmless. If it’s a cyst, it is a small sac filled with air, fluid, or other material. A tumor refers to any unusual ...

The classic symptom of contact dermatitis is an itchy, red rash with bumps or blisters. There may also be skin dryness, cracking, burning, and flaking. A lipoma is a slow-growing, fatty lump situated ...

It mainly develops on the hands and feet and isn't contagious. It causes white or flesh-toned fluid-filled bumps. The cause is unknown, but it's believed to be related to abnormal immune function.