Pain at the bottom of the heel can be caused by Achilles tendonitis, bone spurs, soft tissue injuries and other causes. 1. Achilles tendonitis: it is a sterile inflammatory lesion of the Achilles tendon and the surrounding tendon membrane. It may be caused by chronic injury, trauma, and infection. Due to the stimulation of inflammation, patients may experience pain at the bottom of the heel. 2. Bone spurs: may be caused by osteoporosis, bone and cartilage biochemical changes and other causes of bone proliferation. When walking, the bone spur presses the surrounding tissues and nerves, which can lead to the phenomenon of pain at the bottom of the heel. 3. Soft tissue injury: it may also be due to long time walking, running and other reasons, so that the heel tissue after long-term pressure of soft tissue injury, thus causing pain. Bottom of heel pain can also be seen in other diseases, it is recommended that patients go to the hospital in a timely manner, follow the doctor’s instructions for treatment, to avoid delaying the condition.