Feet muscles always feel sore and soft may be caused by physiological factors, may also be the manifestation of certain diseases, such as spinal cervical spondylosis, lumbar disc herniation, trauma, etc., should be timely consultation to identify the cause of the disease. 1. Physiological factors: It may be caused by over-exertion, such as standing and walking for a long period of time, which can lead to the symptoms of soreness and tenderness of the feet, and the symptoms will be relieved soon after resting. 2. Pathologic factors (1) Spinal cord cervical spondylosis: when the intervertebral disc protrudes backward and stimulates the spinal nerves, the nerves can be compressed, resulting in weakness of the lower limbs, a feeling of stepping on cotton, easy to fall, and difficulty in walking. (2) Lumbar disc herniation: it may stimulate the sciatic nerve, causing sensory and motor abnormalities in the area innervated by the sciatic nerve, which may be manifested as soreness and weakness of the calves. (3) Trauma, if external impact or accidental fall, it may lead to the phenomenon that the muscles of the calf always feel sore and weak. In addition to the above factors, it cannot be ruled out that it is caused by other factors. It is recommended to go to the hospital as soon as possible for examination, and after clarifying the cause of the disease, give targeted treatment.