I have slight pain on my knees. i feel it more when i bend my knees. i did not fall and they are not even swollen. i don't know what could be the course. i don't have pain anywhere else in my body. what could be the course of such? and what can i do?

Several things : Generally, knee pain without swelling & without other joint involvement is less worrisome. Knee pain is often due to change in activities (more kneeling/walking/running/bending/stairs) or to shoe issues (high heels, inadequate arches, worn out). Exercises to strengthen quadriceps muscles (can find online), better shoes, ice after activity, & Tylenol or ibuprofen can help; if not call Dr