you may need to have a permanent nail avulsion -- surgical removal of the entire nail and destruction of the matrix (the area where nail growth takes place) either chemically laser ablation or surgically. many people with ingrown nails -- most in fact -- cause them by improper nail trimming. hopefully you are not among this crowd. see a podiatrist.
i have ingrown toenails. they have been removed but keep growing back worse. can i prevent then from growing in that way