First of all, it depends on the degree of injury and whether there is a patella fracture. This is very troublesome. There's no way to put a plaster or anything. You must tie the patella with something to grow well. If you have time, you'd better see a doctor and remember to follow the doctor's advice.
Secondly, a general injury still needs a month's rest to ensure recovery. I ran in a hurry for about half a month and repeated it again.
Finally, you can still run after recovery, but you should pay special attention. First, you'd better go to the plastic track. Don't run on the concrete floor, it will hurt your knees. Second, wear knee pads when running. Professionals such as LP can support the patella. If the injury is serious, you should buy knee pads with braces first. Try to buy something more expensive. Cheap looks almost the same, but the pressure difference will hurt your knees. I think it costs 2000 to 3000 yuan. Third, to change the running posture, the forefoot should touch the ground as much as possible to cushion the stress on the knee. Fourth, if you feel uncomfortable during running, take a rest until the next run has not recovered.
You can ask me again if you have any questions. Remember to follow the doctor's advice about the injury.