Why is ther pain in my wisdom tooth and lymph node?

Infection: If there is infection in the tooth or the soft tissue around the tooth, the lymph node could be swollen and tender. Please seek the help of a dentist or oral surgeon asap.

Third Molar Pain: You may need a antibiotic to reduce the infection in your wisdom teeth(third molars). Please see your dentist today as this type of infection as you describe can lead to a medical emergency. He may recommend extractions or irrigate the tissues with a medication. A dental radiograph will need to be taken too. Do not wait on this.

Probably infection.: Pain in a wisdom tooth is generally from a cavity. However, if the lymph node on the same side is tender, then it's probably an infection of the tissues around the tooth = "pericoronitis." the only predictable way to get rid of this long-term is to remove the tooth. In the meantime, try warm salt-water rinses and keep the area as clean as possible, even if it bleeds a little when brushing.

The infection spread: The wisdom tooth and/or the associated gums/bone is infected. Lymph node is trying to prevent further spread of the infection. Please see your dentist!

Possible infection: It is possible to have a gum infection around a wisdom tooth, especially if the area has been difficult for you to keep clean. Lymph node swelling is an indication of infection. It may or may not be related to your wisdom tooth. You should see your dentist or an oral surgeon to be sure.

Infection: A lymph node is basically the body's filter. If you have infection your body sends white blood cells to fight the infection. This causes these cells to die and the lymph nodes filter these dead cells. When the lymph nodes become swollen its basically means they are backed up with dead cells like a clogged faucet. It takes time for this go down. Treat the cause.

Infection: If your lymph node is swollen and painful that means that your immune system is responding to something. It sounds like you have an infected tooth. The node becomes swollen because it is busy making white blood cells to fight the infection.

Because there's probably an infection. The tooth may have an unresolved cavity/abscess, or it may have damaged surrounding tissues. You may need antibiotics, extraction, or both. Please see your Dentist or a wisdom tooth specialist, an Oral Surgeon.