My Big Toe Was Hurting So I Trimmed The Nail

My big toe was hurting so I trimmed the nail and clear liquid ran out. I then continued to trim the nail to get as much fluid to drain as possible. I have trimmed off about half of my toenail. I used hydrogen peroxide on it, then put Neosporin on and covered it with gauze as it was still leaking some fluid. Did I do the right thing? What caused the fluid under the toenail?