Your knee pain could be due to ligament sprains or tears, tendonitis or a meniscal tear.. Its common cause of knee pain in young athletes often caused by overuse or repeated stress on the knee joint. It can cause pain around the kneecap that worsens with activities like jumping or squatting. Contact a specialist to get it checked thoruoghly. You need to rest your knee to avoid pain and activities that aggravate your symptoms. Try using ice packs or a cold compress for 10-15 minutes to help reduce pain and swelling.