The causes of thigh muscle tightness and pain after rice-planting include muscle strain, lumbar disc herniation, cold thigh, etc., which can be treated with ice packs, oral ibuprofen and other painkillers. 1. Muscle strain: rice-planting may lead to thigh muscle strain, causing thigh muscle tightness, pain, need to immediately stop the movement and local ice packs to reduce local congestion, ice packs 72 hours after the local massage or hot packs to achieve blood circulation and eliminate blood stasis, the purpose of pain. 2. Lumbar intervertebral disc herniation: patients with lumbar intervertebral disc herniation can compress the nerve root when bending over to transplant rice seedlings, causing pain, numbness and other abnormal sensations in the thigh muscles, which can be relieved by bed rest and taking non-steroidal anti-inflammatory drugs such as ibuprofen. It should be noted that pregnant women, lactating women, gastric ulcer patients are prohibited from using the drug. 3. Cold thighs: When planting rice seedlings, the feet step into the cold water field, it is easy to make the legs cold, which leads to muscle spasm, causing tightness and pain, after taking local warmth can relieve the symptoms. All of the above medications should be used under the guidance of a doctor, avoid self-medication. If the above symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner to clarify the cause of the problem and then give targeted treatment.