Symptoms of chondromalacia patellae: Knee pain or knee weakness, most pronounced in squatting, going up and down stairs, and most difficult to go downstairs. It improves with rest and worsens with activity. Causes of chondromalacia patella: Excessive climbing, squatting, stair climbing and other activities that cause wear and tear of patellar cartilage. Conservative treatment for chondromalacia patella: 1. Stop climbing, squatting, going up and down stairs and other activities. 2, pain can take non-steroidal anti-inflammatory painkillers. 3, take glucosamine to assist cartilage repair. 4.Physiotherapy: ultrashort wave, etc. 5, rehabilitation exercises: wait for the symptoms to ease after the static squatting exercises (i.e. squatting horse stance, not squatting), 15 minutes / time, 2 times / day.