I got kicked in the shin in gym class a week ago and i have a small dark bruise. it doesn't hurt to walk, but the slightest tap on the leg hurts badly?

Deep bruise: Sounds like something the body will resolve over the next few weeks. The bruise may turn dark purple to more blue green as it is healing. Try not to re-injure the area.

Bone Bruise: Having played college Lacrosse,I can identify with your pain. It sounds like a bone bruise. It may get and remain swollen for quite some time. You might even have a bump there for awhile. Nothing to worry about other than it hurting when it gets bumped. You should let someone know that this happened and maybe record it on a calendar,diary, phone so you can refer back to when it happened.Good Luck

Be patient: This is a normal healing process. See your doctor if a bruise lasts longer than 2 weeks or your symptoms become more severe or frequent. Take care.