What could throbbing in the arch of ny foot be?

Plantar fasciitis?: This pain can be quite severe and impairs ambulation. Fracture of the bone/stress fracture can cause severe pain as well, but not likely without trauma or excessive use-i.E jogging/running/jumping etc...It is difficult to tell for sure without examining your foot, but plantar fasciitis is likely. Use of arch support, motrin/aleve, stretching etc...If not better, consult doc.. Good luck.

Many causes: We need more information to be able to give an opinion on this, reasons can include, arthritis, plantar fibroma, callus, tendonitis, foot deformity etc, .

Pain: in the arch of the foot is typically inflammation or a tear in the fascial band. If there continues to be pain or throbbing that doesn't go away get examined by your Podiatrist for a definitive diagnosis and treatment plan!.Get better soon!