Pain in the round bone below the big toe is generally considered to be metatarsitis of the first metatarsal, below the first metatarsal there are two small metatarsals. If you often walk with weight, it will cause the metatarsal bones to be subjected to increased load, and over time, metatarsal inflammation will occur, manifesting as pain below the first big toe, and treatment measures are as follows: 1. Treatment should first pay attention to avoid walking too much, especially to avoid walking with weight, such as walking up and down stairs, hiking, hiking, or walking with a heavy schoolbag, holding a child, these activities can aggravate the condition of metatarsal inflammation, aggravate the pain, If the effect of conservative treatment is not good, local closed injection can be carried out to directly apply the drug to the lesion to achieve better results. 4. If the effect of injection treatment is still not good, surgical treatment can be considered to remove the lesion from the metatarsal bone.