When the tarsal joint falls, the sharp edge at the bottom front of the heel bone rolls down to the ground. Then, the plantar ligament that attaches to that part will be pressed down by your body weight—while it is being overstretched. This eventually causes the ligament to tear apart from the heel bone. Then, the uric acid that was floating around that area will attach to the damaged surfaces of the bone and ligaments absorbing the calcium from the damaged bone or ligament. As time passes by, it grows like a bone in a thorn shape at the bottom front of the heel bone; that is the heel spur. Walking on this heel spur can be very painful.
Treatment: The orthotics that align the ankle bones reposition the heel bones properly and can spread the body weight throughout the bottom of the foot including the arch area—where it is engineered to carry the most bodyweight. This relieves the pressure from the heel area instantly and eases the pain.
(Uric acid is a waste product of nutrients that appears to be powder-like crystals in various shapes and sizes. This uric acid should go out of our body through urine. However, at the bottom of the foot where there is poor blood circulation, this uric acid can be floating around more than the other parts of the body.)