Depends on the severity , if any of your teeth are very mobile , dentist will check the teeth and later decide if they may have to be extracted or can be treated to save your teeth.

Periodontal scaling n root planing is one complete treatment, and it is important to stop further spread of the disease

You will need to visit a dentist and undergo a proper check up , and with proper oral hygiene measures you will be fine.

Root canal treatment and Apicectomy if the infection persist after root canal treatment.

Try to change your diet into soft food and non chew food for a month, do some heat applications in the area in front of the ear. If it doesn't settle in 2 weeks, book an appointment with dentist.