I am getting very worried about my parents in law. About 3 months ago they caught headlice from my niece. They bought some stuff from the chemist and I explained to mil how to treat it. Seemed to be sorted but recently she is convinced they are back and that fil has them too. What she is describing though seems really odd. She says they are all over her body, in her clothes, up her nose and in her ears. Apparently fil has them too even in his pubic hair. I can't see anything in their hair but as much as I love them am not going to examine the rest of their bodies!
They have been to GP several time who can't find anything and has basically told them it is all in their imagination.
Mil particularly is getting very distressed by the whole thing and almost in tears over it. she is convinced the bugs are there and has even posted a sample to a museum as she thinks she must have a rare condition none has ever heard of!
What can I possibly do to help them? Gp has said they cannot have anymore lice treatment as they have used too much already and has essentially told them to not bother him with it again. Most probably it is all in their imagination but they are convinced and getting really distressed. Any ideas?