Welcome to Diabetes Forum Mann! A side effect of taking insulin is weight gain. Some gain weight, others do not. I have gained weight using insulin. I have accepted the weight gain. Insulin helps me to control my blood glucose like no other medication. I take 5 injections per day and my abdomen can get a little sore if I keep injecting in the same places. I have been fortunate to be able to inject in different areas so that most of the time I do not even feel the needle go in. I hope that you have time to visit the forum often! Thanks for joining us!