I would address this issue with your doctor.<br>One thought I had is; my daughter gains weight when her bacterial load is decreased. Meaning, when her body is not fighting infection and burning calories doing so, she gains weight. Usually happens after being treated with antibiotics for an infection; after she's off the antibitoics, the her weight increases. Her increase would be 3-5 pounds.<br>25 pounds is alot, though. Were you underweight? Could some of it be fluid retention? Talk to your doctor.