What is the best treatment for a tiny blood blister on corner of lower lip?

Time. If the tiny blood blister is of recent onset and due to trauma, it will likely resolve and disappear with time. If the blood blister has been present for an extended period, it is possible it could represent a hemangioma (abnormal enlarged blood vessel) which should not pose a problem unless it is constantly traumatized and bleeds. Your dentist can advise you or refer you to a specialist.

Related Questions

I have a small canker sore looking thing on the inside of my lower lip. Not painful. It looks more like a blood blister rather then a normally white s?

7 days vs a week. There is a joke in dental school, that with medication it takes a week to heal, and without, 7 days. However, there are some things that are helpful. If you frequently get these, try the supplement lysine daily. Avoid acidic foods and crunchy items that can irritate it, like potato chips. Rinse with warm salt water as a palliative measure. And there are OTC palliative salves. Read more...
Canker sores. Canker sore are generally somewhat painful. It may not be a canker sore and you might be correctly calling it a blood blister if you accidental bit your lip. See your own dentist for a definitive diagnosis. Read more...
Is it a canker sore? Maybe harmless mucocele (blood blister). Usually they're not a problem and will go away on their own. If concerned see your dentist for evaluation and surgical removal. Read more...