Contrast bath---It is a form of treatment where a limb or the entire body is immersed in warm water followed by the immediate immersion of the limb or body in ice water. This procedure is repeated several times, alternating hot and cold. Note that the treatment should always end in the ice water, as heat will induce the body's inflammatory response, while cold helps to decrease inflammation. • Point your toes • Raise your heels • Squeeze your toes • Roll a ball. Roll a golf ball or tennis ball under the ball of your foot. Apply light pressure for about two minutes. • Stretch standing up. Stand up and place your toes against a wall; lean forward a little until you feel your arch stretch. Repeat using the other foot.

May be vascular or arthritis problem

Sir, It might be due to uric acid. Check his uric acid and avoid giving products made of protein in night And for swelling he can take contrast bath means take two buckets one with hot water and other with cold water. And he will dip his legs 3mins in hot water and 1 min cold water alternatively for 15-20 mins