I recently increased my physical activity to lose weight , group exercise and treadmill. I have moderate pain when I bend deeply and there is a swollen squishy area on the lateral sides of my patella. left is worse than right and I know I never saw this before when I would bend. I have to put weight on my hands I cant put all my weight on my legs when bending because it s painful (scary tight sensation like me knee will come apart). seems like it might be bursitis but I m reading that it s more common to have that on the medial side ??? do I need to see a doctor or can I treat at home ?