Nerve fiber = multicellular, containing both an axon and surrounding myelin sheath. The axon comes from a single neuron, but the myelin sheath is made by a train of many myelinating Schwann cells. In the case of unmyelinated axons, the unmyelinated fiber shares each Schwann cell with several other unmyelinated axons.
Flat feet (pes planus) occur when a child has no arch in their foot. Because an arch does not form, the foot appears to turn to the outside. Children with out-toeing due to flatfeet will rarely experience pain symptoms will not require treatment.
1 Get enough rest. Fatigue can often cause a person to stub a toe and fall.  Leg braces and in-shoe splints can help keep the foot in the right position for standing and walking. A physical therapist can supply these and provide exercise therapy, if needed.