Allergic contact dermatitis, also known simply as contact dermatitis, can cause an itchy red rash on the affected area.
Atopic dermatitis, more commonly known as eczema, is a condition that causes red and itchy skin, but it is not contagious.
Psoriasis is a chronic autoimmune disorder causing itchy red patches on elbows, knees, torsos and scalps. There are seven types of psoriasis.
Rosacea is a chronic skin condition causing red patches, small red (sometimes pus-filled) bumps or tiny blood vessels visible on the face.