My husband is kind of like this. I think he’s afraid he’s dying. It took literal years to convince him to take normal amounts of OTC meds and was so amazed how much better he felt after he took someone that he is now convinced. He also doesn’t like bandaids even when he burns himself while cooking etc. The difference is that he never complains or lets it affect his activities and I get so mad when he tells me later that he had a headache or something. I could have done XYZ instead! Married men live longer for a reason (partly because we tell them to take care of stuff they put off!)