Metronidazole tablets are effective in treating swollen and painful gums. Generally, red, swollen and painful gums that bleed when touched with a foul odor are manifestations of gingivitis. You can take metronidazole tablets orally, along with cephalosporins. Gingivitis is a mixed infection dominated by anaerobic bacteria, so it is recommended to take oral cephalosporins along with oral metronidazole tablets. If an abscess has formed, the effect of oral medication alone is not obvious. It is recommended to go to the Department of Stomatology of a regular hospital or the Department of Oral and Maxillofacial Surgery of a large hospital to perform an abscess incision. That is, a small incision is made in the lowest position of the abscess and the pus is drained from the abscess. This will control the inflammation, and periodontal treatment will be performed after the inflammation is controlled.