Skin ,Nail, Hair Allergic Disorder

Skin, nail, and hair allergic disorders occur when the immune system overreacts to a harmless substance (allergen) in these areas.

Key conditions:

Skin:

Allergic Contact Dermatitis: Itchy rash from direct contact with allergens (e.g., nickel, fragrances, poison ivy).

Atopic Dermatitis (Eczema): Chronic itchy, inflamed skin, often linked to allergies (e.g., dust mites, food).

Urticaria (Hives) & Angioedema: Itchy welts (hives) or deeper swelling (angioedema) from food, meds, insect stings, etc.

Nails:

Allergic Contact Dermatitis of the Nail Unit: Inflammation or nail changes from nail products (e.g., acrylates in artificial nails).

Hair/Scalp:

Allergic Contact Dermatitis of the Scalp: Itchy, red, flaky scalp from hair products (e.g., hair dyes like PPD, preservatives, fragrances).

Diagnosis: Often by physical exam and patch testing (for contact dermatitis).