How do i gain weight. i am fairly underweight and i try eating more but it just doesn't help. any tips?

See Dr.to find cause: Several things can cause this. The main ones are inadequate intake of calories, need for hydrochloric acid &/or digestive enzymes, malabsorption, inflammation of the intestines (possibly from intestinal parasites), celiac disease & other food allergies, vitamin/mineral/amino acid deficiencies & hyperthyroidism. A good GI doc or holistic/integrative doc can help you find what the problem(s) is/are.

Underweight: How is your health otherwise? Is your doc concerned? If medically well consider a personal trainer or working out at the gym to increase muscle tone and definition. Higher protein such as a protein powder shake can be helpful. Celebrate your overall good health if that is the case. Peace and good health.