Heel bone pain, the causes of this condition are as follows: First, the most common cause is plantar tendinitis, the starting point of the plantar tendon membrane is in the heel bone, and the termination point is at the base of the metatarsal bone. If you often walk with weight, such as walking up and down stairs, hiking, hiking, walking with heavy school bags, it will cause an increase in the tension of the plantar tendon membrane, and if there is a strain on the plantar tendon membrane at the starting point, it will manifest as deep pain in the heel of the left heel. Second, it may be heel subacromial bursitis, there is a bursa below the heel bone, called heel subacromial bursa. If you often wear high heels or hard-soled shoes, and also walk for a long time with weight, it will cause the tension of the heel bursa to increase, and the heel bursa will become hyperplastic and produce bursal inflammation, manifesting as pain directly below the heel bone.