pimple on the forearm. skin problems on the back and arms. post-adolescent rashes

acne adult allergy arm arms back background blemish blister body care caucasian condition cosmetology dermatitis dermatologist dermatology disease dry eczema female finger forearm girl hand health human hygiene illness infection irritation macro male medical medicine pain patient people pimple pimples portrait post-adolescent problem problems puberty rashes reaction red scratching skin symptom treatment verruca virus woman zit