What should you know about red painful bumps on skin?

A boil is often a tender, deeper lump that may collect pus. Cellulitis presents as spreading redness, warmth, swelling, and pain rather than a single isolated bump. Hidradenitis suppurativa causes recurring painful nodules, commonly in skin folds, and may leave tunnels or scars. Shingles presents with pain or tingling followed by grouped blisters, usually in a band on one side. These are distinct patterns, but early appearances can overlap.

Keep the area clean and avoid squeezing, piercing, or applying harsh home remedies. Photograph the area and note when it began, whether redness is spreading, and whether fever, drainage, blisters, or repeated episodes occur. A clinician may need to examine the skin in person. Treatment can range from wound care to antiviral treatment or abscess drainage, depending on the diagnosis; do not use leftover antibiotics or antivirals without advice.

Get same-day medical advice for rapidly spreading redness, severe pain, fever, red streaks, substantial swelling, or a bump near the eye. Urgent assessment is also needed for new one-sided blistering pain, especially when it affects the face. People with diabetes, reduced immunity, or poor circulation should seek advice early. A recurring painful lump in a fold should be assessed for hidradenitis suppurativa.

Does the distribution suggest an infection, boil, shingles, or hidradenitis suppurativa? Do I need a swab, medicine, or abscess drainage? What signs mean the redness is spreading? How can recurring lesions be prevented?