The causes of plantar swelling and walking pain include plantar trauma, infection, aseptic inflammation, gouty arthritis and achalasia, etc. It is necessary to improve the auxiliary examinations in order to clarify the cause of the disease. 1. Plantar trauma: there is a clear history of plantar trauma, resulting in plantar soft tissue contusion or even fracture and other lesions, the tissue may ooze edema with pain. 2. Infection: Bacterial infection of the soft tissues of the soles of the feet is common in the clinic, mostly due to the presence of broken skin on the soles of the feet, in the case of improper disinfection, bacteria invade from the broken skin, and then cause infection, with symptoms of redness, swelling, heat and pain on the soles of the feet. 3. Aseptic inflammation: mostly caused by foot trauma and chronic strain injury, plantar fasciitis is common, the fascial tissue due to inflammation and oozing, edema, so the soles of the feet when walking there is also pain. 4. Gouty arthritis: the body’s uric acid is too high, urate deposition in the plantar joints around the soft tissues, which will lead to redness and swelling of the soles of the feet as well as pain, walking pain can be aggravated. 5. Achalasia: it is related to the increase of bone density in the heel bone due to the elevated pressure in the heel bone, which will lead to swelling and pain in the heel bone and the soft tissues around the heel bone when walking. It is recommended that the patient go to the hospital to improve the auxiliary examination to clarify the cause of the disease, and the professional physician will give the appropriate treatment for the cause of the disease.