For the causes of pain on the top of the left foot, the reasons are as follows: 1, dorsalis pedis fasciitis: due to frequent weight-bearing walking or strenuous physical activity, the dorsalis pedis fascia will be pulled, over time, there will be damage, and the surface of its aseptic inflammation, mainly manifested in the back of the foot pain, soreness and swelling sensation. When this situation occurs, we must avoid sports activities, full rest, and give active anti-inflammatory, pain treatment, you can also give a hot compress treatment. 2, wear the shoes are not suitable: for example, shoes are too small, too tight, it is easy to make the back of the shoes and the surface of the foot friction, over time, it will cause dorsalis pedis soft tissue injuries and inflammation of the fascia, which will be manifested in the dorsum of the foot, the situation must wear loose shoes, to avoid friction and cause dorsal fascia pain! This situation must wear loose shoes to avoid friction and cause dorsalis pedis fasciitis.