Toenails commonly have a natural tendency to curl. Therefore it is important to equally give your toe pressure from underneath the toe as you walk. For instance, if you keep pressuring on a side of the big toe when you walk, the other side of the toenail is prone to curl inward.
Also, when people start having a mild ingrown toenail, they try to avoid pressuring the side of the toe that has affected ingrown because it hurts – this is the beginning of a vicious cycle. Pay attention to the way you stand and the way you walk, and try to give an equal pressure on your toes so that nail can grow straight.