Husband is about 4 weeks post op

Husband is about 4 weeks post op
He is back at work full time (has been for 2 weeks). His job requires a lot of walking but he says he is taking it easy and taking breaks and what not.
He is doing PT 2-3xs a week.
He is complaining of a lot of pain and he is assuming it’s where they took his hamstring.
Yesterday he started getting pain in front top portion of the knee. PT feels it’s scar tissue and is trying to break it up. Anyone else experience this?
I think he is beginning to feel discouraged bc he thought he would be doing a lot better. He also said pt had him lay on stomach and basically had his foot almost touch his butt yesterday and it hurt like hell. Is this feeling normal? He also said pt said his rom is on track.
Anything he can be doing at home? He comes home and I ice it for him and give him Motrin. He is still walking with a limp which I am wondering if bc he is walking funny is that also effecting him hamstring area and now front of knee?