Sore legs after standing for a day may be related to poor blood circulation, bone and joint diseases, excessive fatigue or myofasciitis, etc. It is necessary to check the cause of the disease, and then carry out targeted treatment, such as medication and exercise therapy. 1. Poor blood circulation: Keeping standing for a long time, the blood is concentrated in the legs, which easily induces the symptoms of aches and pains, which is related to poor blood circulation, and can be considered to be relieved by massage and hot compresses. 2. Bone and joint disease: when there are bone and joint diseases of the lower limbs, such as degenerative joint disease, after standing for a day, it is easy to trigger the symptoms of leg pain, you can consider taking the nutrition of articular cartilage medication, such as chondroitin sulfate and so on. 3. Excessive fatigue: After standing for a day, due to the continuous contraction of the leg muscles to maintain posture, it is easy to experience excessive fatigue, thus producing symptoms of leg pain, which can be relieved by rest. 4. Myofasciitis: standing for a long time may cause local fascia or muscle aseptic inflammation, thus producing symptoms of leg pain, you can take non-steroidal anti-inflammatory drugs treatment, such as Meloxicam. If the symptoms are more serious, you need to be under the guidance of a professional physician targeted treatment, usually try to avoid prolonged sitting and standing. The above medications should be used in accordance with medical advice.