Disadvantages of eating cold drinks: it doesn't matter if you eat only one a day if you are healthy. Due to the influence of high temperature, the human body will produce a series of physiological reactions, leading to listlessness and loss of appetite. At this time, if you can arrange your diet reasonably and eat some cold drinks properly, you can not only quench your thirst, but also help digestion, with balanced nutrition and good health. However, some people often do not pay attention to hygiene when eating cold drinks and overeating, which leads to many diseases, such as food poisoning, dysentery and viral hepatitis. Therefore, when eating cold drinks, we must pay attention to: eating too much cold drinks will dilute gastric juice, affect digestion, stimulate the intestine, make peristalsis hyperactive, shorten the time for food to stay in the small intestine, and affect the absorption of nutrients in food. In particular, people with acute and chronic gastrointestinal diseases should eat less or not.

The disadvantages of overeating: overeating is a bad eating habit, which will bring a lot of harm to people's health.

After eating, the digestion and absorption of food depends on the normal structure and function of gastrointestinal tract and digestive accessory organs. Chew the food in your mouth first, then swallow it into the esophagus, and then push it into your stomach. In the stomach, food is fully mixed with the contents of the stomach, stored, and transported to the small intestine in batches through the pylorus. Protein is mainly digested in the stomach, high fat-soluble substances such as alcohol are slightly absorbed in the stomach, and carbohydrates, protein, fat, vitamins, electrolytes and other substances are completely digested and absorbed in the small intestine. There are annular folds on the surface of the inner wall of the small intestine, with thousands of villi and microvilli, and its surface area has increased by more than 30 times, with a total surface area of more than 250m2, which is equivalent to the area of a tennis court. With the help of various digestive juices, the nutrients are fully and completely absorbed in the small intestine, and finally the food residues stay in the large intestine for 1 ~ 2 days, absorbing about 1, 500 ~ 2000 ml of residual water every day, and are excreted in the form of feces through intestinal peristalsis. Overeating will completely disrupt the normal rhythm of digestion and absorption of food in the stomach.

Digestive accessory organs play an equally important role in the digestion and absorption of food. Pancreatic endocrine insulin regulates blood sugar and secretes a variety of digestive enzymes. Pancreatic amylase digests carbohydrates, such as rice, pancreatic lipase digests fats, such as meat, and trypsin and chymotrypsin digest protein, such as lean meat. The liver is like a huge biochemical processing plant. Hepatocytes participate in the metabolism and synthesis of various substances, including alcohol, and secrete about 600~ 1200ml of bile every day, which is excreted into the gallbladder for storage through the bile duct and discharged into the duodenum if necessary to help digest fat. Overeating will require a large amount of digestive juice in a short time, which will obviously increase the burden on the affiliated digestive organs.

There is a complete nervous system network in the gastrointestinal wall, and about 65.438 billion nerve cells are divided into two dense sub-networks, in which the myenteric plexus controls the main gastrointestinal movement and the intestinal submucosal plexus controls the main mucosal sensory function. After eating, food stimulates submucosal sensory neurons to release neurotransmitters, "informs" intermuscular motor neurons, regulates gastrointestinal movements, and ensures regular appetite and defecation every day. The central nervous system continuously controls the digestion and absorption of food through the brain-gut axis. Before the Chinese New Year, people became busier at work, and there were many social activities besides work all day. Many people spend all day in bars and dinners, overeating and living a very irregular life. Emotional excitement and mental stress affect the central nervous system, leading to gastrointestinal motor-sensory system disorders and diseases.

After overeating, dizziness, brain swelling, mental trance, gastrointestinal discomfort, chest tightness, shortness of breath, diarrhea or constipation may occur, and in severe cases, acute gastroenteritis and even gastric bleeding may occur; Drinking too much fish and meat will overload the liver and gallbladder, accelerate the metabolism of liver cells, increase bile secretion, cause liver function damage, aggravate the condition of patients with cholecystitis and hepatitis, and also make the pancreas secrete a lot, increase the pressure in the duodenum, and induce acute pancreatitis, which can be fatal in severe cases; The study found that 2 hours after overeating, the risk of heart disease increased by 4 times; When diarrhea occurs, the old people lose a lot of body fluids, the whole body blood circulation is reduced, the blood is concentrated and viscous, and the flow is slow, which leads to cerebral artery occlusion, cerebral blood flow interruption and cerebral infarction. Once the above adverse consequences occur, there is no need to panic. Those with severe symptoms should seek medical attention in time and deal with them correctly so as not to delay the illness.