To be honest, at this age, any reason is possible. I fractured my left knee and placed a steel plate and nail, and it was swollen for half a year. Maybe when you are old, you can't be as demanding as young people and exercise to a normal state, but you can still find a way to get swollen:

1, apply Chinese medicine, I am in Changzhou, and apply the medicine I bought in Jintan myself;

2. Put your legs high and don't always hang down below;

3, ice compress, in this case, it may be too old to eat, consider it properly.

It is best to ask the doctor if there are any questions, such as whether the steel plates are different in size. However, if you have doubts about doctors, doctors are generally not happy. It is recommended to pay more attention at ordinary times and put your legs higher when you sit down.

I hope the patient will recover soon.