I found a white pill that is oval and on one side it has the number 93 and on the other side it has the number58 can anyone tell me what this pill is and what it is used for?

You can get some pretty good help by calling your local pharmacy and asking them to look it up in their PDR. Or, unless you fear someone in the house has questionable drugs, just destroy it. I almost said to flush it down the drain but that practice has started to become a big problem. Fish now show signs of drugs that are only found in meds. Don't flush.

Drug Name
Tramadol Hydrochloride
Strength(s)
50 mg
Imprint
93
58
Manufacturer/Distributor
Teva Pharmaceuticals USA

Generic names: Tramadol hydrochloride
Brand names: Ultram

Here is a link for more information:
Tramadol hydrochloride patient advice including side effects

Basically it is used for mild to severe pain. Don't take it unless it is prescibed to you.