Why do I have pain in the back of my feet after standing for a long time?

Standing in one position for long periods of time can cause stagnation of Qi and blood stasis in the back of the foot, causing swelling and pain.
In addition, prolonged standing may also induce plantar fasciitis, Achilles tendonitis and bursitis, which in turn can lead to pain. A typical symptom of chronic plantar fasciitis is sharp pain in the anterior medial part of the heel, sometimes more intense, especially after the first few steps of walking in the morning, after prolonged walking, running or after prolonged standing, which is usually relieved or disappears after appropriate massage and physiotherapy or rest.
Therefore, rest and avoiding prolonged standing are usually required after pain.