I am a 21 years old boy weighing 51 kg and having a height of 5'10"(tall) approx. I am very lean especially from my upper body and sometimes I feel ashamed of my body. I want to grow some good muscles and fat. I ve tried ayurvedic capsules but they didn't work well , I started feeling pain in my leg and got stomach related problems and when I stopped taking them I lost 5-6 kgs(which I gained). Some people have advised me to take injections(allopathic) but I fear side effects. My last hope of gaining weight is through homoeopathy. I would also like to add that for the last 15 years I was milk intolerant but now I ve no problems with milk and its products. Please advise me what to do ? and any medicine. And I am also a patient of chronic rhinitis and get frequent sneezing and have now developed sinusitis and polyps. It comes for a few days and goes and then comes back after four five weeks And I am not addicted to alcohol,drugs and even smoking.