My boyfriend gets mad at me for complaining but he does everyday?

[LeksiStella]

Okay, so my boyfriend suffers from a disorder with his stomach. He constantly has stomach aches and such. I take care of him all the time. I make him food, give him massage, cuddle him, take naps with him, buy him things... and yes I do get some of that back in return but I also put up with him saying he hurts 24/7 I never complain at all... but I sometimes complain of a headache or cramps and he tells me I complain to much and need to grow up if I can't handle a headache. Is it really wrong to complain sometimes? Advice please.