Hello, You need to start with a complete dental exam, full set of x-rays and cleaning. This will determine issues with other specific teeth as well the condition of your gums. Your periodontal health must be considered as well as tooth infections. A complete physical with blood tests will determine if you have systemic complications or deficiencies. This will determine your thyroid function and if specific additional tests need to be ordered. Infections, once and if diagnosed, will need treatment and a possible antibiotic prescription. Reduce symptoms of inflammation with anti-inflammatory medication such as Tylenol or Motrin. Benadryl, an antihistamine, has anti-inflammatory benefits as well. Corticosteroids, by prescription, can reduce greater amounts of swelling and inflammation. Warm salt water rinses can help cleanse and soothe. Prescription chlorhexdine gluconate rinses are antimicrobial and benefit healing abilities. Maintain proper dental hygiene, good nutrition, balanced vitamins and stay well hydrated. Avoid irritants including smoking and alcohol. Noduals on the gums, under the tongue could be tori which should not cause any of your symptoms. Other causes include an abscess, growth, tumor or salivay gland disorder. Lymph nodes can be swollen when fighting an infection. Have you taken any antibiotics with your recent treatment? You may have a resistant infection and need a different antibiotic to be effective in controlling your symptoms. Viral infections can cause various oral symptoms and generally need to run a course to resolve. Allergic reactions are another possibility. This can range from food, medications to dental products. Thank you for your inquiry. I hope you will continue to evaluate the source of your condition if your symptoms are not decreasing. I will gladly answer addtional questions.