If the pain only appears after a lot of activities, it should be improved by practicing in the way shown in several classic lower limb strength exercises, and it should not cost any money. If the pain is intense and persistent, further photos are needed to check the joint quality.

(Dr. Zheng Lu from the Third Hospital of Beijing Medical University solemnly reminded me that I can't fully understand the illness because I can't see the patient face to face. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )