Hoping you can tell me, is purple bump inside mouth a sign of hiv?

Not always...: A 'purple bump' inside the mouth could be a sign of HIV infection; however, there are multiple reasons to have a purplish bump in the oral cavity that have nothing to do with hiv/aids. Sometimes local irritation from something as simple as biting the lip or inside of the cheek can cause a raised purplish area like a bruise on the skin. If you are concerned about hiv, get an HIV test performed.