Can i leave ingrown toenail? it was releasing pus a year ago. it's been a year without it releasing pus and hurting?

No, it is not recommended to leave an ingrown toenail untreated, even if it is no longer releasing pus or causing pain. Ingrown toenails occur when the edge of the nail grows into the skin, causing pain, swelling, and sometimes infection. If left untreated, an ingrown toenail can lead to more serious complications such as a deeper infection or even gangrene.