What is the ruling on removing a tooth [while fasting], as some blood may be swallowed?

Shaykh Muqbil ibn Hādī al-Wādiʿī:

If he is swallowing his own blood, then this does not invalidate the fast – In shā Allah. However, if he delays this until Iftār, as it is feared that he will be harmed, delaying this until night is better. He should delay it until the night.