Why can't i gain weight in my body anymore? especially my upper body including my waist. i only gain weight in my face. solutions ?

Weight gain: Is it just "weight" (including fat) that you're wanting to gain in your upper body, or are you looking more for muscle? Gaining muscle requires a healthy food plan along with weight training to increase your muscles' size. You will also need extra protein. See your doctor to make sure this won't be a risk to you, and so you stay healthy. A trainer can help with workout guidance & diet too.