4 fingers swelling flake skin and lg cuts my son has it to antibiotic hasn't helped was told a staff its painful and bubbles under the nails help!?

Could be a...: ...Possible exposure to an environmental irritant (such as ivy, oak, liquid detergents, soaps or other chemicals). Rarely mercury exposure can cause a painful rash to hands or feet. Consider psoriasis or other autoimmune conditions if associated with fever, a rash or joint pain/swelling. If recent or concurrent illness, consider staph or strep infections. See your doctor for a complete evaluation!