52kg!! That is a very low weight, especially for a male. You have got to start eating! I know you said you can't eat but I was thinking - what about Sustagen or Ensure? They are like a can of powder and you mix it with milk. It gives you all the vitamins etc that you need, and it tastes really nice. There are different flavours but if you aren't really able to stomach the flavour thing you can just get vanilla and it is quite nice too. The body doesn't lie, my friend.