牙龈上长出小疙瘩怎么解决

女，9岁，蛀牙特厉害，那几天牙疼的厉害，倒是不牙疼了，可长出疙瘩了，而且稍有点疼，这怎么办？````````````````````````````````````````````````````````````````````````````````:需要医生帮助提供远程诊断：怎么能把疙瘩快速去掉