Chronic skin conditions include: rosacea, which is characterized by small, red, pus-filled bumps on the face. psoriasis, which causes scaly, itchy, and dry patches. vitiligo, which results in large, irregular patches of skin.

Allergies, irritants, your genetic makeup, and certain diseases and immune system problems can cause rashes, hives, and other skin conditions. Many skin problems, such as acne, also affect your appearance.