Hello, You are 21 years old and you want to increase your weight and hand muscles. You have taken Decadron - With decadron you will get the steroid symptoms which may cause some weight gain, but how? 1) Reduces the metabolism – so less consumption of calories. 2) Increases the appetite – So more caloric intake The excess calories are deposited as Fat in the body. Because of fluid retention the face and other parts of the body may appear shiny and puffy. There may be wasting of muscles also. Chronic usage leads to lots of side effects and diseases. The only way to increase your weight and increase the muscle strength is doing optimum gymnastic exercises, more of isometric in nature and simultaneous intake of a high nutrient diet rich in protein and vitamins. Proteins and Vitamins can also be substituted orally by way of caps/tab/syrup/powder. If you are continuing the tab decadron reduce the number of tabs step by step and stop the tab in total within a week. You will get side effects if you stop abruptly. You can even consult a Dr. for dosage schedule for step by step reduction Quickly come out of that steroid and lead a normal life before any danger. All my best wishes