If accessible, use water pik to irrigate the area infected & you may include peroxide or salt in the irrigation water be sure to rinse the water pik after by sending clean water thru it after the tooth irrigation is ended. you can get creative & use baking soda ,or vinegar, or iodine, etc.
Now here is something that worked for me: eat up to 12 tomatoes raw only & if you can find raw cheese, unsalted for pain this works great. I got up to 7 tomatoes & the abscess burst! I had a tuff time to find unsalted cheese so I bought it at least raw anyway. The main thing is the tomatoe. My abscess has not returned in 2 years. have fun.. bob