How to treat an ingrown toenail?

On my right big toe, my toenail is ingrown on the right side. How do I fix it? How does soaking it in warm water help? I read that I should put cotton under it to prevent it from growing into the skin, but how can I do that when it's already grown in? Pus has started to ooze out...





I also now know to cut nails straight across.How to treat an ingrown toenail?
Go to the hospital because thay got to cut it out!

c++