Pain down the edges of the toenails is fairly frequent and often gets called “ingrown” when most cases are not actually ingrown toenails. A genuine “ingrown nail” is when the nail has truly grown into the skin, pierces the skin and can turn out to be quite painful and is usually inflammation-prone. https://podiatryfaq.com/knowledge-base/the-side-of-the-toenail-hurts-but-its-not-ingrown/