I am a boy of 20 years though I am a non vegiterian I am not with enough weight and my bones are seen outside I want become fat please help me

I'm thin too... well... I think that we just have to eat more... but it's easier to said than done... eat 5 times a day... or more... especially at night...

Some people just don't gain weight like others do. What types of food are you eating. Do you exercise a lot or are you very active? Do you really want to gain bodymass as in Fat or as in muscle. You also are still quite young. Sometimes it takes time for your body to develop and maybe it is just that is the way your body type is. I know I used to be 125 pounds around 5 years ago. Now I weigh 159 and I don't look much bigger but I don't look super skinny either.

Have you ever asked your doctor? It would be wise to consult him/her before you do anything drastic with your diet. Also, it would be good to know why you cannot gain weight.

See your doctor, it's really your best option to find out and to stay healthy.