I'm sorry to hear about your toothache, especially since it's worse at night and triggered by cold weather. This could indicate sensitivity or an underlying dental issue like decay or infection.

• You can try taking an over-the-counter pain reliever such as paracetamol or a non-steroidal anti-inflammatory drug (NSAID) like Zerodol-SP (which contains aceclofenac and paracetamol) after consulting a doctor, as it helps reduce pain and inflammation.
• Avoid very cold or hot foods and drinks that may worsen the pain.
• Maintain good oral hygiene but be gentle around the painful tooth.
• Applying a warm saltwater rinse may help reduce discomfort temporarily.
• Since your pain has lasted 5 days and worsens at night, it is important to see a dentist promptly to identify and treat the cause, which may require specific dental care.

If you experience severe swelling, fever, difficulty swallowing, or spreading pain, seek emergency dental care immediately. Otherwise, please consult a dentist soon for a thorough evaluation and appropriate treatment.To narrow down potential causes, we will need some more information.Please tell me your age and gender.