Scalp Redness: Causes Beyond Psoriasis—Seborrheic Dermatitis, Contact Dermatitis, and More

1. Seborrheic dermatitis: Red, scaly, itchy patches from excess sebum.
2. Contact dermatitis: Allergens (hair dye, products, jewelry) or irritants (harsh chemicals).
3. Fungal infections (ringworm): Contagious, red, itchy.
4. Psoriasis: Chronic, red, scaly patches.
5. Lichen planus: Rare, autoimmune, red, itchy patches.
6. Folliculitis: Inflamed hair follicles from bacteria, fungi, shaving.
7. Drug reactions: Antibiotics, antifungals, chemo drugs.

See a doctor for accurate diagnosis and treatment.