looking like a crackhead

[ming]

ok seriously i have a friend which has a really really hard time gaining weight. so much that she looks like a crackhead.
the only time she was happy with the way she looked was when she was smoking pot everyday and had massive munchies. even then she only weighed 120 lbs. now she has stopped the smoking and away went the munchies.
the weight dropped to a 109 lbs. she tries to eat and eat and eat but gains no weight.
she has tried weight gainers, b12 vitamin, and eating like hell but she gets sick of eating.

im at a lost and dont know what to advise. ive told her to go to the doctor but she doesnt want to.
she is a healthy 26 year old. what do you think?

 

[plornive]

(calories in - calories out) / 3500 = pounds gained

If she is not gaining weight, she is not eating enough, right? It sounds like the problem is psychological. If she really wanted to gain weight badly enough, she could just buy tub of weight-gainer and drink an extra 2000 calories per day. That would do it.