The most common causes of sore feet are lactic acid buildup, soft tissue injuries, plantar fasciitis, rheumatoid arthritis, gout, and lumbar disc herniation, etc. If the symptoms persist, it is recommended that you seek medical attention in a timely manner. 1. Lactic acid accumulation: If the patient carries out strenuous foot activities such as playing soccer, it may cause the accumulation of lactic acid in the foot muscles, and the metabolism of lactic acid may cause foot pain. 2. Soft tissue injury: patients with a history of foot trauma or impact, causing foot muscles, ligaments, blood vessels are damaged, it will produce soreness. 3. Plantar fasciitis: mostly related to repeated wear and tear and trauma to the patient’s foot fascia, which is a kind of aseptic inflammation, and can stimulate the surrounding nerves to produce soreness when inflammation strikes. 4. Rheumatoid arthritis: it can occur in many joints of the patient’s body, and it can cause soreness in the feet during acute attacks. 5. Gout: Poor control of uric acid levels in the patient’s body produces gout stones in the feet, which can also cause pain. 6. Lumbar disc herniation: patients with lumbar disc herniation can also cause pain and numbness in the lower limbs by pressing on the nerves, which in turn can cause soreness in the feet. Causes of foot pain is more, may also be related to corpus callosum lesions, fatigue fracture, corns, osteoporosis and other diseases, if there is no relief after resting, it is recommended to go to the hospital in a timely manner to find out the cause of the disease, by the doctor targeted treatment.