The plan of the year begins in spring, when everything comes back to life and flowers bloom. The weather is suitable for traveling and exercising. However, the temperature difference between morning and evening in spring is big, and the weather is changeable. One day it is sunny, and the next day it may be cloudy. Bacteria and viruses become so active in spring that they can invade the body and cause a series of diseases. 

Which diseases are most common in spring?
1. Cardiovascular diseases
Although the temperature rises in spring, it is not stable. The temperature difference between morning and night is large, which is easy to make the blood vessels suddenly shrink and dilate, and then lead to the rise of blood pressure, increase the burden on the heart, and even induce stroke and myocardial infarction. Middle-aged and elderly people can not hurry to take off cotton clothes, not too early morning exercise, exercise time should be arranged after the sun rises.
2, allergic rhinitis
In the blooming season, there are too many allergenic substances floating in the air, such as catkins, dust mites and pollen, leading to a variety of allergic diseases, such as atopic dermatitis, conjunctivitis, asthma and rhinitis. The most common is allergic rhinitis, which is characterized by a persistent runny nose accompanied by sneezing and tightness in the chest. People with allergies should avoid going out, wear a mask when necessary, and wash their hands and face as soon as they get home.
3. Depression
Spring metabolism speeds up and endocrine activity also changes greatly. In addition to the weather changes, can disturb the physiological function, and then disturb people's mood, temper becomes unusually grumpy and depressed. So should be reasonable catharsis, with an optimistic attitude in the face of everything, appropriate outdoor activities to pleasure.

4. Respiratory diseases
Spring morning and night cold, the body can not temporarily adapt, make immunity and respiratory resistance weakened, easy to induce respiratory diseases. In particular, the northern spring is windy and dusty, which makes the throat dry and causes sore throat. People suffering from respiratory diseases should pay more attention to, according to the weather changes timely increase or decrease clothes, do a good job of neck and ankle parts to keep warm. In spring, there is too much pollen floating in the air, which is easy to cause respiratory allergies, so you should wear a mask when you go out.
5. Degenerative arthritis of knee joint
Knee degenerative arthritis is a common disease, this kind of people around the knee joint tissue is more fragile, nerve is also more sensitive. The southern spring rainy, long time in the wet environment can stimulate joints, and then induce disease. Usually to do a good job of knee warm, wear knee pads when going out; Before sleeping with hot water bubble feet, let the hot water soak above the ankle joint, can improve lower limb blood circulation.
6. Diarrhea
All kinds of pathogenic bacteria are very active in spring, which makes the food easy to spoil, and the slightest mistake will lead to diarrhea and abdominal pain. Therefore, we should pay attention to food hygiene, maintain three meals a day regularly, and stay away from cold and raw food. Eat more fresh food and less or no leftovers.