<s>[INST] Hi...I broke one of my back molars about 6 months ago and did go to dentist.  It didnt hurt oranything but about a week ago I developed a blood blister above this area.  The blister just broke today and bleed a little bit.  I know I need to see a dentist...what to do in mean time? [/INST] Hello and welcome. Thanks for sharing your concern. Blood blisters would have developed due to continuous irritation from the jagged end of the tooth. For now please maintain good oral hygiene. Take plenty of fluid and semisolid diet. Avoid hard, hot and spicy food products. Try to apply local anesthetic gel like colonel before food so that the pain is relieved. If you find more discomfort you can take analgesics too. Please do not ignore and get the tooth treated soon. Hope it helps. Thanks. Take care. </s>