If you have a cold, you should eat more fruits rich in vitamin C, such as oranges, mangoes, pineapples, etc. These fruits can effectively improve your immunity.

However, it is recommended to take some cold medicine. The common cold can heal itself in about a week, but symptoms such as runny nose, cough and headache are still very uncomfortable. It is recommended to take some cold medicine while supplementing vitamin C to relieve your cold symptoms.

I hope I can help you.