Nerve damage that is going to get better usually does within a year.
Nerve pain can be treated wiHisth a medicine called gabapentin, or lyrica.
Additional information: Pain here might not be from the knee at all: it can be from a disc problem in the lower spine.
If so, it is often correctable.
Take your husband to an MD specialist of physical medicine and rehabilitation.
They are experts in structural diagnosis and treatment, and can probably help align him, even with the artificial knee and improve this pain.
they can also test in the office to see if this is nerve damage.
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