navel on the abdomen. red flat lichen planus. red spots on the skin

allergen allergy back blister body care chest condition damage dermatitis dermatology diagnosis disease elderly excitability gibert health illness immunity infected infection infectious issue itching leg lichen medical overheating pain pityriasis rash red redness rosea scars scratch serious sickness skin sore soreness spots suffering swelling symptom telangiectasia treatment virus weak woman