You can relieve cold symptoms if you drink plenty of fluids and encourage your body to sweat. Here is a recipe for a drink that can help.
To make 1 drink
1/8 teaspoon cayenne pepper
Juice of 1 lemon
1 clove garlic, crushed
1 tablet Vitamin C
4 floz/115ml hot water
Mix all the ingredients together in a cup which already holds the water and then sip slowly. The garlic and cayenne pepper will make you sweat, while the lemon juice and Vitamin C tablet provide extra Vitamin C.