 It's well known that flat feet can be hereditary. In fact, if flat feet run in your family, that's a good one, run in your family, there is a higher chance of you developing the condition. There are also developmental issues. Remember that in infants and toddlers, flat feet are normal because the foot arch hasn't developed yet. However, if the arches don't develop as the child grows, it could lead to flat feet in adulthood. And don't forget that injuries to the foot or ankle