Hidden pain in the arch of the foot may be related to plantar fasciitis, flat feet, etc., and need to be treated with medication or surgery according to the cause. 1. Plantar fasciitis: plantar fasciitis causing vague pain in the arch of the foot is mainly treated by medication, such as non-steroidal anti-inflammatory drugs, including topical diclofenac diethylamide latex, oral ibuprofen extended-release capsules and so on. 2. Flat feet: the hidden pain in the arch of the foot caused by flat feet is mainly treated by surgery, such as soft tissue transfer repair, bone surgery, subtalar joint braking, etc., which can reduce the strain of the heel navicular ligament and the medial ligament, and achieve the purpose of relieving the symptoms. The above medications should be used under medical supervision. If you have symptoms of vague pain in the arch of the foot, it is recommended that you consult a doctor in time to confirm the cause of the disease and then carry out targeted treatment.