Does anyone knows how to remove calluses in the knees?

If they’re truly calluses, I would recommend lotion… but only if he won’t be doing anything with his knees like what he did to get said calluses… that would only make it worse.

Soften the skin… the calluses will come off as skin eventually.

Source

“3. File away any developing calluses with an emery board or pumice stone following a bath or shower, when the water has soften your callus.
Step4
Use a softening agent like Ultramide 25 lotion to peel away thick calluses.
Step5
Apply lotions and moisturizers generously. Use lanolin, Vaseline or vitamin E oils on feet, hands, elbows, knees or anywhere a callus is likely to develop.

Wear knee pads if you spend a lot of time on your knees gardening, scrubbing or waxing the floor. Knee pads will prevent callus formation.

You must mean on the surface of his knees? He must stop doing what caused them to form in the first place. They grow to protect overused areas. Guitar and other string players grow calluses on the hand that presses the frets.

Knee pads; some sort of balm to rub on, little metal abraision sticks that will scrape some of the callus away.

Apply a cortizone cream and wrap in cling film aech night for a week and then lightly smoothe with a pummice stone.

Hey Presto!