DS is 13 and I have brought him up alone since divorcing his father 9 years ago. we have managed to muddle along OK until recently, when I started to find what looks like some sort of discharge on his bed sheets. He doesn't suffer from acne but refuses to say whats causing the stains. I am worried that he might have some sort of skin disease that he is too embarrassed to talk about. would I be justified in forcing him to go to the doctor?