Cold is often an infection of the upper respiratory tract caused by a cold virus or bacteria, and even if you take cold medicine in time, you need to have a course of illness. In general, as long as you drink more water and take more rest, you will gradually recover from the cold after 5-7 days. However, if the body’s resistance is weak, especially in the elderly or children, a cold without active treatment can easily induce the appearance of lower respiratory tract infections. The duration of the cold will then be longer, even up to half a month to a month, so it is important to actively treat the cold at this time. Generally you can use cold and flu medicines, such as pediatric aminophenol pseudo-lax dispersible tablets and pediatric platelet. If you are an adult, you can use Banlangen granules, Sensitive Health, Soybean Qinghe granules, Cold and Flu Qinghe granules, Cold and Flu Spirit granules, or use Pu Di Lan Anti-inflammatory Oral Liquid, Blue Scutellaria Oral Liquid, Four Seasons Anti-Viral Combination for antiviral treatment, which are more effective.