My friend was getting fellatio and during that his foresking got retraced and now won't come up. He's not having any pain but he can see the glans of the penis which is connected from the opening head and till where the skin got retracted he sees a lymph or a small bubble type thing which is connected to glans only. As it's first time his skin got retracted he's having a bit pain while urinating and feel different while walking as well. Any oil or cream he should apply or what?