Got Hit On Leg. Have Swelling And Soreness Below Knee. Worrisome
Swelling of any aspect of the body occurs as a inflammatory response. It can occur as a result of trauma or infection due to the release of chemicals in the blood stream that promote movement of fluid from inside the cells to the outside.This movement of fluids results in swelling.
The image that you sent demonstrates an open lesion to your leg and your body will still be releasing inflammatory mediators to respond to this resulting in continued swelling.
Swelling would also occur if there is any injury to the bone or as a result of infection so you may want to rule this out by an xray and review by your doctor,if it has not been done already. Other indicators of infection would be an increased warmth compared to the other leg, excess redness and discharge.
If you can use anti inflammatory medication to dampen the inflammatory response it would help. This would include medications such as ibuprofen/cataflam/voltaren/celebrex.
If possible to obtain,the use a compressing bandage would also help with the swelling.
I hope this helps. Feel free to ask any other questions