Hello

my son that is 18 has lost 50lbs in about 4 months . He is now on the verge of being under weight according to his bmi but by looking at him you can see his bones already . He’s on ensure and fortisip from the dietician . 

The gp is no help and keeps saying it’s behavioural as he has autism . He has night sweats , pain in his body , his skin colour is pale . Body feels hot but no fever .Low appetite He’s not producing much urine . He has low blood pressure . Fatigue  The gp won’t refer him to anyone as she keeps saying his bloods are all normal even tho he is very dehydrated . I’ve asked for urine and stool samples to be done incase he has a parasite. But she said this isn’t required .  They have been monitoring his weight loss for months and it’s still dropping yet still the gp isn’t concerned . He has no more weight to lose as his body fat is now around 8% and he’s lost a lot of muscle also . 

The gp just keeps giving him more pain killers but not anything else.  I’ve now had to turn to the internet to try and find out what can be causing my son these issues