If it will help you to stop, then tell someone. If you think you can stop on your own, then you don't HAVE to tell anyone, but it helps to have support. You obviously know cutting isn't healthy, so even if you don't want to tell someone because you want to keep doing it, don't. Feel free to
PM me if you want to.
As for infections: Anything you use can cause an infection if it's not sterilized. Just keep antibiotic ointment of some sort on it until it is fully healed. Bandaids also help keep it clean.
Using hand soap is okay, I suppose. I wouldn't think it would make it worse. Just might hurt. And if your cuts are green, then it may be infected. Keep an eye on them, keep them clean, and if it gets worse or it becomes very severely sore and red, you need to tell someone so you can get proper care.
Cuts of any sort are going to hurt if you touch them, but again keep an eye on them and if they start getting worse and not healing, let someone know as soon as you notice.
-Kelly