How can i prevent knee pain that only happens when standing for long periods?

Flatfeet?: Hopefully mommyagian is not wearing high heels. Assuming you are not, check and see if you have flatfeet. Flatfeet will place extra stress on the inner portion of the knees. If this is the case try wearing orthotics and see if tis helps.

Exam: There are numerous reasons for knee pain and an evaluation is generally required. Most orthopedics exams are directed at identifying surgical problems. Patients are often surprised much of knee pain is poor control at the hip and ankle. Two YouTube videos review the concepts: https://www.youtube.com/watch?v=43Nh5aYwFnA https://www.youtube.com/watch?v=t6SXiDCMP3E

First: Get an evaluation by a Doctor to exclude any serious problems. If there is no serious problems found, then you can wear an ace-like bandage which is not too tight to give a little support and keep the knee warm. Routine exercise is the best treatment.