Find out the cause. Tingling in the foot can mean several things. Probably most commonly it is due to pressure on the nerves in the foot, and might respond to changing tight shoes or using arch supports. Tingling can also be due to pinched nerves in the back. The primary therapy for that problem is exercise for the back.
Neuropathy. You could have neuropathy. Are you diabetic? See your doctor. There are excellent medications hat can help.
No good answer. Not knowing when the tingling started or what caused it, it would be impossible to put a time frame to this problem. You should consider having an examination.