The cold is often seen in the following situations: 1, poor body resistance, such as the elderly, people with underlying diseases, these people have poor body resistance, easy to catch a cold. 2, people who do not pay much attention to their own bodies, such as the weather changes will not add clothes or reduce clothes in time, easy to catch a cold, easy to catch a cold after the cold. If you keep catching a cold, you must identify the cause, prevent it, and exercise more often to improve your body’s resistance. If there is a basic disease that causes the body’s resistance to decline, you should actively treat the basic disease. If it is caused by bad habits, you should correct your bad habits as soon as possible, and usually you can also strengthen nutrition, you can take medicinal and dietary supplements, which is also a great aspect to improve body resistance.