Question: what does it mean when you have a big bump on your knee?
Answer: Bursitis of the kneecap is inflammation of the bursa found between the front of the kneecap and the skin. Kneeling for a long time can cause kneecap bursitis, which can develop into an egg-shaped bump on the front of the kneecap. Bursitis usually gets better if you avoid the activity that caused it.