 [ Symptoms ] on synthroid for 15 yrs when i start losing weight on diet my levels change & have to increase dose why & what to do [ Disease ] most helpful answer i am sorry to hear you are going through this it is enough to deal with a well functioning colostomy let alone a leaky one my hunch is that you need to be re fitted for a better fitting wafer and bag system your stoma and the area around it will change shape over the next few weeks or months as swelling from the surgery decreases this changing shape means the wafer and bag system you were sent home with may not work forever in fact you may find you need to be re fitted several times over the next few months    and even years later as you gain or lose weight which we all do  i would suggest you call your surgeon is office for assistance or to request a consultation with a wound ostomy continence woc nurse he or she can help you find a colostomy bag system that works for you best wishes