Tooth should be checked first by taking small X-ray.if it is grossly decayed( damaged majorly)  you can go for extraction. But if it is firm and only some part of tooth is damaged due to cavity followed by pain then ,without extracting( removing)  the tooth, root canal treatment can be done.  This way your tooth can be saved for some time.   Consult the dentist properly for more information.

Please consult a dentist for proper dental examination and done a complete dental x-ray (OPG). Sometimes gums related problem like bleeding gums and needed cleaning of teeth (scaling). Sometimes decayed teeth and in this condition RCT or extraction of tooth. But first you consult dentist, then after treatment plan.