it called calcaneal spur.it may cause inflammation of foot. Contrast bath---It is a form of treatment where foot is immersed in warm water followed by the immediate immersion of the foot 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

The small piece of bone that you think is troubling him, is called the calcaneal spur. Physio & rehab along with some medications will give him relief in about 6 weeks. Symptoms suggest planter fascitis secondary to a calcaneal spur. Calf stretching, toe stretching along with exercises for intrinsic muscles . Contrast bath must. Silicone soft heel are must for him. Will take 6 weeks to resolve.