How can i dissolve an ingrown toenail?

You can't : You may be able to get some relief by soaking your foot in an epsom salt solution 2-3 times a day for 20 minutes each. If it doesn't resolve or begins to show signs of infection, like swelling, redness, or yellow drainage you should have it evaluated by a physician.

Not the best way: Seeing a podiatrist to have it taken care of properly is the best way to resolve an ingrown toenail. Sometimes, 40-50% urea can be applied to the nail under occlusion to hydrolize (waterlog) the toenail to have it come off might be what you are thinking.