There are more reasons for lymphatic pain from the root of the tongue to the neck, which may be caused by bad diet, pharyngitis, subacute thyroiditis and so on. It is recommended to go to the hospital for differential diagnosis by professional doctors at this time to avoid delaying the condition.1. Bad diet: After eating excessive spicy and stimulating food, it can stimulate the mucous membrane of the mouth and throat, causing edema of the mucous membrane of the mouth and throat, which may feel pain from the root of the tongue to the lymph of the neck. At this time, we should keep the diet light and easy to digest, eat more vitamin-rich vegetables and fruits, ensure oral hygiene, and rinse the mouth after meals, which can usually recover on its own. 2. Pharyngitis: Infection by pathogens such as bacteria and viruses can lead to pharyngitis, and inflammatory stimulation can cause swelling of the root of the tongue, mucosal erosion, and even purulent lesions, resulting in lymphatic pain from the root of the tongue to the neck. Blood tests and examination of the throat are required. If a bacterial infection is identified, antibacterial drugs such as amoxicillin granules and cefixime tablets need to be used as prescribed. If it is a viral infection, it usually requires oral treatment with drugs such as ribavirin pellets as prescribed by the doctor; 3. Subacute thyroiditis: the thyroid gland is located on both sides of the throat, and due to the immune inflammatory response, the thyroid gland can become enlarged, diffuse inflammatory changes, etc., which can cause throat discomfort, lymphatic pain from the root of the tongue to the neck, and even fever and other symptoms. It can be a self-limiting disease. In mild cases, patients can use indomethacin enteric tablets and celecoxib capsules for pain relief as prescribed by the doctor, and in severe cases, prednisone acetate tablets are also needed.