Ur problem can b clear only after complete assessment. So better u consult to the Physiotherapist

Start strength exercise and hot fermentation

Apply Hot Fomentation twice daily.

There can be various causes for the leg pain, but nothing can be said without examining the patient.One advice I can give is that he can raise his legs by keeping 2-3 pillows and move ankle up and down for 10-15 min , it will help in pumping up the calf muscles and wash away the metabolites,thus help him to better sleep. If it doesn’t help consult a doctor.

Hello, as you have given limited information we cannot pin point identify the reason behind pain , but the pain can be of muscle origin due to poor strength. Stretching of calf muscles and hamstrings can provide relief along with hot compress over the area before sleeping.

There is lot of reason. I think its a kind of nerve compression. Or any other vascular occlusion. So first u should Consult a good physio.

If the pain is restrained only when he tries to sleep. Then it could be result of either calcium deficiency or hyper excitability of nerves in simple terms. Try taking warm milk, and a cold shower before sleeping. A further investagation from a neuro specialist is necessory.

Consult with a physiotherapist who have orthopaedic experience for proper assessment and treatment.