I'm sorry to hear you're experiencing severe pain and swelling near your last tooth. This could indicate an infection or an abscess, which often requires prompt attention.

Here are some steps you can take:

• Seek dental care promptly: A dentist can properly diagnose the cause of the pain and swelling and provide appropriate treatment, which may include antibiotics or drainage if there is an infection.
• Pain relief: Over-the-counter pain relievers like ibuprofen can help reduce pain and inflammation temporarily, but avoid self-medicating with prescription drugs without a doctor's advice.
• Maintain oral hygiene: Gently rinse your mouth with warm salt water several times a day to help reduce swelling and keep the area clean.
• Avoid irritants: Stay away from very hot, cold, or hard foods that may worsen the pain.

Please avoid using medications like Zerodol TH 4 Tablet (which contains a muscle relaxant and anti-inflammatory drug) for dental pain unless prescribed by a doctor, as it is not specifically indicated for dental infections.

Because severe pain and swelling near a tooth can lead to complications if untreated, I strongly recommend consulting a dentist as soon as possible for an accurate diagnosis and appropriate treatment. If you experience fever, difficulty swallowing, or spreading swelling, seek emergency medical care immediately.To narrow down potential causes, we will need some more information.Please provide your age and gender.