It could be a sign of Morton’s neuroma, a foot condition affecting the ball of the foot (typically between the third and fourth toes) involving the thickening of tissue around a nerve that leads to the toe.
Sometimes, Morton’s neuroma can also cause toes to burn, sting, or feel numb–or can cause sharp burning discomfort on the ball of the foot.
Usually, there is no lump or other outward sign of the condition, which is usually experienced by women and is associated with wearing tight-fitting high-heel shoes.
The Mayo clinic suggests not ignoring foot pain that persists for more than a couple of days.
They also say that you should contact your doctor if you have burning pain in the ball of your foot that does not get better when you try different footwear and change your activities so as to reduce stress in your foot.
Source: Mayo Clinic