Big toenail pain is caused by your toenail penetrating the corner edge of your toe. The pain is often worse while walking or when putting pressure on the area. Without care an ingrown toenail may lead to infection.
Your treatment will be to control the infection and relieve pain of the area as soon as possible, and practice proper foot care to prevent any recurrence.
One of things you need to pay attention to is keeping you toenails trimmed by cutting them straight across the top, and don’t taper or round off the corners or trim too short. Try not to cut out the ingrown toenail yourself it is better to have a doctor take care of this to avoid more problems.