If you're feeling cold, there are several things you can do to warm up:

1. Put on more layers of clothing: Wear a sweater, jacket, or coat to add insulation and trap heat close to your body.

2. Use a blanket: Wrap yourself in a warm blanket or comforter to help retain body heat.

3. Move around: Engage in physical activity like walking, doing jumping jacks, or dancing to generate body heat.

4. Drink warm beverages: Sip on hot tea, coffee, or warm water with lemon to help warm you from the inside out.

5. Check the room temperature: Make sure the room isn't too cool. Adjust the thermostat if necessary.

6. Use a heating source: Turn on a space heater, fireplace, or other safe heating device in your living space.

7. Eat warm food: Have a bowl of soup or another warm meal to raise your core body temperature.

8. Avoid drafts: Close windows and doors to prevent cold air from entering your space.

9. Use hand warmers or foot warmers: These disposable packets can provide localized warmth.

10. Take a warm bath or shower: The heat from the water can help raise your overall body temperature.

If you consistently feel cold despite these measures, it might be worth consulting a healthcare professional to rule out any underlying medical conditions.