The causes of sudden plantar pain are as follows: a. Acute plantar fascia injury: For example, if a patient performs strenuous sports activities during the day or performs a lot of sports activities without sufficient warm-up activities, it can cause damage to the plantar fascia, which can tear microfibers, and therefore bleeding and sterile inflammation of the plantar fascia can occur. Patients often experience acute pain in the plantar fascia after stopping sports, and the pain can be very pronounced at night in a quiet state. Second, acute lumbar disc herniation: when the herniated disc tissue compresses the spinal nerve root, it causes acute radiating pain in the lower extremities, which can radiate all the way to the soles of the feet.