There is a tendon in the sole of the foot pulled tight may be due to cold stimulation, long-term strain and other physiological reasons, may also be due to flat feet, lumbar intervertebral disc herniation and other pathological reasons. 1. Physiological reasons: the soles of the feet are at the bottom of the body, the farthest from the heart, for ischemia, hypoxia changes more sensitive than other parts, when the soles of the feet by the cold stimulation, it will lead to vascular contraction, the soles of the feet soft tissue tension, there may be a tendon is very tight feeling. Long-term strain can lead to micro-injury of the plantar fascia, resulting in plantar fasciitis, which may also be manifested in the above symptoms. 2. Pathological causes: congenital or acquired arch collapse, resulting in flat feet, will cause the medial longitudinal arch of the foot is overstretched, there may also be a feeling of the plantar fascia is tight; lumbar intervertebral disc herniation compression of the nerves, resulting in the lower limb muscle strength is abnormal, there will be atrophy of the soft tissues of the foot, which may be manifested as the above symptoms. The symptoms of tightness in the soles of the feet alone may not be able to accurately determine the cause of the problem, and it is necessary to combine with the characteristics of the medical history and other test results to make an accurate judgment, and it is recommended to clarify the cause of the disease under the guidance of a doctor and targeted treatment.