Cystic acne occurs very deep under the skin's surface, forming a red, tender nodule that ... says dermatologists can lightly burn these doughnut-looking bumps off with electrocautery, laser ...

Sunburns typically appear 3 to 5 hours after sun exposure ... to recover from a severe burn. A common symptom of sunburn is erythema, which is when the skin becomes red or pink.

Razor burn is an uncomfortable but largely innocuous condition in which shaving causes the skin to become irritated. A red rash and small bumps may develop. For those with sensitive skin ...

Red bumps on your legs ... It causes little red lumps or pimples on the skin, often known as razor burn or razor rash.