Weight loss. Help me increase my weight.

It would have been better if you had posted your height also, so that we could have estimated ideal weight for your height. As you know few people have very high basic metabolism rate. It will be difficult for them to gain weight. Also one should remember gaining weight and losing weight is a very gradual process. It will a lot of time, patience and determination. You must follow a healthy diet and exercise schedule. Start having food rich in proteins like pulses, soyabeans, vegetables, fruits, egg whiteboiled , boiled chicken. Regarding exercises, start cycling or swimming, whatever you are comfortable with and enjoy most. Along with it try doing high bar excercises. You can also visit a dietician for further queries regarding diet. If vomiting occurs repeatedly then consult a gastroenterologist soon for evaluation of malabsorption disorders.