hand of a young boy with brittle or very weak nails, on gray background, no faces shown

background bad brittle broken care child close closeup condition copy damage dehydrated dermatitis dermatology disease dry faces finger fingernail fragile fungal gray hand health healthcare healthy ill isolated line medicals moisture nail nourishing old onychorrhexis onychoschizia peeling problem procedure protect recovery regeneration shortage space syndrome thyroid treatment unhealthy vitamin weak year