My friend's ear is hurting...help?

My friend got hit in the ear and he said it started ringing for about 2 minutes. He went swimming with us today and he said when he went underwater it felt like a nail went through his ear and his throat started burning. About 2 hours later, he tried to pop it and it made a squeaking sound that everyone could hear. My aunt( shes a nurse) said that he has swimmers hear, but we think he popped an eardrum. Should he talk to his mom or go see a doctor or ask my mom (a pharmacist) if he should use ear drops??? Whats the matter with his ear??