Definition
An ingrown toenail is when the edge of your toenail grows into the surrounding skin. Imagine it like a splinter under your nail bed! It usually happens on the big toe and can be quite painful. The skin around the nail becomes red, swollen, and tender. Improper trimming, tight shoes, and injuries can cause ingrown toenails. Unlike a normal toenail, an ingrown toenail causes inflammation and discomfort.