Ingrown toenail is caused by clipping your toenail too deep on the sides, or by chewing your toenails. Don't do it unless you want a trip to the doctor.
You will know you have an ingrown toenail when the toe starts to bother you around 5-7 days after you caused the trauma. It will CONTINUE TO GROW until you get it removed, it will never go away. It will develop scab tissue over the enflamed part to protect itself.
Betsy developed the unfortunate habit of chewing on her toenails, and several weeks later she had 2 ingrown toenails.
My ingrown toenail is causing an infection.
They cut my toe off be cause of the ingrown toenail!