Is a diuretic safe 10 days after surgery?

I went to surgery at 111 lbs and out at 116.The weight was decreasing for a 3 days then shot back up.My doctor was adamant about not losing weight but I am very bothered because I have been eating reasonably. I know I'm being obsessive but I'm going crazy. Is it ok to take hctz to see if it's water weight? Or is it possibly stuck in the tissues?My last surgery I gained 5 lbs that never came off without strict diet but my surgeon says it will affect my breasts.Thank you for indulging a crazy girl


