Possible causes of pain when stepping on the lateral side of the edge of the sole of the foot include abrasion from strenuous exercise, plantar fasciitis, tenosynovitis, and so on.
1. Wear and tear from strenuous exercise: when the patient experiences pain when stepping on the lateral side of the sole of the foot after a long period of strenuous exercise such as walking, running or hiking, the pain is mostly caused by localized soft tissue injury or tendon strains on the sole of the foot during the exercise.
2. Plantar fasciitis: due to long time walking or running, the muscles of the sole of the foot and its fascia are subjected to repeated excessive tension, resulting in local muscle and fascia strain, causing aseptic inflammation, and plantar fasciitis, which can manifest the symptom of pain when stepping on the outside of the edge of the sole of the foot.
3. Tendovaginitis: there are tendons on the lateral side of the edge of the sole of the foot, due to improper posture, which may lead to repeated wear and tear of the tendons for a long period of time, resulting in aseptic inflammation and symptoms of pain when stepping on the sole of the foot.
There may be other reasons for the pain when stepping on the lateral edge of the sole of the foot, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.