Skin doctors specialize in problems with skin, hair, and nails. This speciality is called dermatology. Skin conditions can be cosmetic such as acne, wrinkles, dark spots, moles, and rosacea. Or they can be life threating in cases such as skin cancer.
Common skin conditions include acne, excessive sweating, pigmentation, psoriasis, etc. Treatments include topical creams, chemical peels, lasers, surgery, and medication. It is recommended to get a yearly skin check for early detection of skin cancer.
People with psoriasis can develop psoriatic arthritis which causes painful and stiff joints. There are several prescription medications that treat this such as Humira, Enbrel, and Otezla.