You can take vitamin C when you have a cold, but you should not overdose on it. Colds are usually caused by viral infections and mainly reflect nasal symptoms, such as nasal congestion and runny nose, and mild cases can usually be cured in 5~7 days. During the cold period, you need to pay attention to rest, drink more water, increase nutrition. Avoid water and electrolyte disorders. Close observation, monitoring and prevention of complications. Diet should pay attention to light diet, avoid eating spicy and stimulating food. Vitamin C is one of the essential trace elements of the human body, has the role of enhancing human resistance, moderate consumption of vitamin C and consumption of vitamin C-rich vegetables and fruits can promote the recovery of the disease. Therefore, when you have a cold, you can take vitamin C appropriately. It is recommended to have a balanced nutrition, adhere to the exercise, and consult a doctor in time if there is any discomfort.