The pain inside the foot when the forefoot is exerted may be related to plantar fasciitis, ligament injury, calcium deficiency, bony structural changes and other factors. 1. Plantar Fasciitis: It is mainly caused by excessive local stress that leads to tearing of tissues, thus inducing aseptic inflammatory reaction and the symptoms mentioned above. 2. Ligament injury: this symptom may be due to external impact, resulting in ligament injury caused by the forefoot when the foot is hard inside the foot pain symptoms. 3. Calcium deficiency: Calcium deficiency usually leads to osteoporosis and degenerative changes in the bone and joints, which leads to the above symptoms, and it is recommended to alleviate the symptoms through dietary therapy and oral calcium supplements. 4. Bone structural changes: Commonly found in bone spurs and other diseases, without timely and effective treatment, it may compress the surrounding nerves and tissues, resulting in obvious pain. If the forefoot hurts when you exert yourself inside the foot, it is recommended to go to the hospital for a detailed examination and targeted treatment according to the cause.