Hello, Your symptoms include signs associated with an infection. The upper tooth could be draining with a pathway to the lower arch and settle in the lymph node causing swelling. Antibiotics such as amoxicillin can help control an infection. You would need a prescription from your dentist after an evaluation. The upper tooth, if found to be the source, would need dental treatment such as a root canal or an extraction. Temporary pain relief and reduction of inflammation may be helped with anti-inflammatory medications such as acetaminophen and ibuprofen. Your symptoms may be unrelated and you need to address each condition separately. Do you have a condition such as a broken tooth or removable dental appliance that is causing irritation below the tongue? There is a salivary gland duct that could be clogged and causes a buildup of fluid. Your toothache can be due to large decay or inflamed gum and bone surrounding the tooth. Untreated decay will progress and cause an abscess if left untreated. Periodontal disease can result in infections and they will spread. You may have a wisdom tooth impacted under your gum and bone since you report discomfort near your ear. Your conditions are best evaluated by a dentist with a thorough exam and x-rays. Warm saltwater rinses may offer some additional assistance at this time. Your lymph node has the job of being the initial defense against infection. A dental abscess could very well cause inflamed lymph nodes. This could also indicate an underlying systemic disease which needs further evaluation by a physician. Blood tests may give you valuable diagnostic information on your organ function and any nutrition deficiencies. Maintain a proper diet with balanced vitamins, keep well hydrated and follow good daily oral hygiene. Thank you for your inquiry. I hope my recommendations are helpful to you and that you are able to schedule a dental visit soon.