###Human: What causes swelling of gums in the place of wisdom tooth after its removal? ###Assistant: Hi. I had gone through your question. I can understand your concern. As per your history, it looks you are having retromolar area infection. It can be because of the left root stem or cavity in adjacent tooth. To get proper advice and safe diagnosis, you need to upload pictures of the involved area. There are chances of traumatic ulcer too because sometimes the hard food in missing tooth area gets accumulated and becomes infected. You can use Chlorhexidine mouthwash or normal saline gargles and continue the antibiotic medication for five days. Make sure to avoid drugs that may affect your infant in case you are a lactating mother.