Hi,
Thank you for the question. Flat feet is an extremely common problem. But there are many other factors to consider before we can say whether the feet are actually pathological and need active treatment. Some of these include the age group of the patient, the activity level, and some other factors. We usually would have to do a thorough examination of the feet/ ankles/ lower limbs, do some xrays or even MRIs, so that we can correctly identify the cause of the flat feet. We can then proceed to offer the correct management for the patient.
Clinically, if you have heel and back pain, it usually means there is some imbalance, and the flat feet could be the cause. Seeing a podiatrist is useful, and they would do a made-to-measure insole to correct your flatfoot. The symptoms may resolve, but if t then it would be a good option to consider a visit to the orthopaedic surgeon.