Hello, Thanks for posting in HCM. There is usually no connection between the foot surgery and frequent urination. Some reasons such as either cold weather which causes frequent urination can be there. Also if your fluid intake have increased which usually does as during and after surgery patients are on IV fluids for sometimes. It usually increases the fluid in body and is excreted as increased urination. Once check you blood sugar levels and see for your diabetic status. Other than this I feel you can wait for sometime so as the problem comes down on its own. If it continues consult your physician for any tests required. I hope i have answered your query well. if you have any more query kindly write back to me will be happy to answer them. Thank you