Rashes by Symptom Combination
Diagnostic guides for rashes defined by their symptom cluster — itchy red rash, rash with fever, blistering rash, spreading rash, non-itchy rash, and painful rash.
Itchy Red Rash: Causes, Diagnosis, and Treatment
What causes an itchy red rash? Learn the ranked causes — eczema, contact dermatitis, urticaria, ringworm, and more — with a guide to narrowing down the diagnosis and when to see a doctor.
Rash with Fever: Causes, Ranked Diagnosis, and When It Is an Emergency
Learn the most important causes of rash with fever — viral exanthems, meningococcal disease, scarlet fever, Kawasaki disease, drug reactions, and more. Know when rash and fever together is an emergency.
Rash with Blisters: Causes, Diagnosis, and When to Seek Help
What causes a rash with blisters? Learn the ranked causes — chickenpox, shingles, impetigo, allergic contact dermatitis, pemphigoid, and SJS — and when blistering rash requires emergency care.
Rash That Spreads: Causes, How to Track It, and When to Worry
What causes a rash that spreads? Learn the causes of spreading rash — cellulitis, drug reactions, allergic contact dermatitis, impetigo, ringworm, and viral rash — and the warning signs to watch for.
Non-Itchy Rash: Causes, Identification, and What It Might Mean
What causes a non-itchy rash? Learn the important causes — Lyme disease, syphilis, psoriasis, purpura, tinea versicolor, pityriasis rosea — and when a painless rash without itch requires medical evaluation.
Painful Rash: Causes, Diagnosis, and When to Seek Emergency Care
What causes a painful rash? Learn the important causes — shingles, cellulitis, erythema nodosum, necrotizing fasciitis, contact burns — and when pain with a rash signals a medical emergency.