I have a coldsore an the scab fell off an it started bleeding a lot then it formed into a blood blister, it keeps getting bigger should i see a doctor?

Cold Sores: The current fda-approved medications used in the treatment of herpes simplex virus in adults are Acyclovir (zovirax), valacyclovir (valtrex), and Famciclovir (famvir). These oral medications have been shown to decrease the duration of the outbreak, especially when started during the "prodrome" (symptom onset before the actual condition becomes fully evident). See you doctor for a prescription.