Ключевые слова: adult, arm, athlete, background, blister, callosity, callus, calluses, chapped, closeup, concept, cracked, dermatitis, dermatology, disease, dumbbell, exercise, finger, fitness, gym, hand, hard, harden, health, human, hurt, injured, isolated, labor, lifestyle, macro, male, man, open, pain, painful, palm, rough, showing, skin, sport, strong, surface, tired, training, white, work, worker, workout,