actinic keratosis or sunspots on sun-damaged skin

actinic basal brown bumps cancer cancerous carcinoma care certain cheek chin close cold cream crusty cryosurgery cryotherapy dermatitis dermatologist dermatology doctor ear exposure eye eyebrow eyelash face finger fluorouracil forehead freckling freezing hand head health hygiene hyperkeratosis illness imiquimod infection keratin keratosis laser lesions lip liquid man medical medicine mouth nitrogen nose ointment ointments organ patch person photodynamic pink precancer problem red right skin solar sore squamous sun sun-damage sun-damaged sunspot sunspots therapy this topical treated treatment tumor under