My friend is a swimmer, he has cuts and other minor skin cut like things all over his fingers. he a few blistery looking bumps near them. thanks:)?

Swimmer fingers: If indoor swimming, then he has softer finger skin with rub injuries affected by chlorine.

Needs to be checked: He should be examined and get appropriate treatment from his Doctor or go to ER

Chemical sensitvity: There may be some contact allergy or sensitivity inflammation to a chemical, but not sure what that chemical would be. Need more information. Hope that helps