One on my permanent front teeth got bumped really hard on someone's head knocking my tooth a little lose and very sore. will it heal on its own?

Tooth trauma : Likely that your tooth will be fine but it would be wise to see a dentist to get an evaluation, trauma can cause fractures or nerve damage

It should...: But you would really be better off if a local dentist took a look and evaluated the damage. Internal problems cannot be determined without radiographs, and if the tooth was moved to a sightly different position, the premature contact with your other teeth when biting could cause bone recession and loss of the tooth. Better to be safe than sorry.

Normally yes, but...: Normally the tooth and the surrounding gum tissue will tighten up, but the trauma may create a situation where the nerve of the tooth may die soon or actually over a long period of time. I would have a x-ray taken on it now to use as a standard comparison to x-rays in the future.

Probably: Most likely it will get tight again on its own. Anti-inflammatory such as ibuprofen will help. Tooth may be at risk of dying and needing a root canal if the trauma was severe enough. although that could show up years from now. It's a good idea to have an x-ray taken to be sure that the root of the tooth or the supporting bone are not fractured.

The rule of thumb: Any dental trauma, even if apparently mild, requires examination by a dentist or an endodontist immediately. See your dentist for evaluation, x-ray and treatment if needed. Good luck!

Probably, but...: Sometimes tooth requires splinting, disarticulation, or root canal treatment. Would be wise to promptly see your Dentist to establish a base line, and to provide treatment if indicated.