How do you cure a blood dot on the inside of my bottom lip?

Lip vascular lesion: The first order of business is to determine what the spot is. If you had recent trauma to the area (hit, bumped, or bit it) then this is likely a small bruise-like injury that will resolve on its on with time. If not, then it may be something called a venous lake or similar vascular lesion which is most often a benign problem that may be treated by surgery or a laser procedure to remove it.

It should heal by : Itself. It may take few days to weeks but don't get alarmed.U can chew some ice chips and alternate with warm salt water gargle. Take care!