We are now at the crossroads of summer and fall, an autumn rain is a cold, the temperature change is large, cool and hot, testing people’s ability to adapt. At the same time is also the whistle system, skin diseases, especially gastrointestinal “emergency” disease prone period. Why is the number of people suffering from gastrointestinal diseases in summer and fall so high? There are three main reasons: the weather is cool, people’s appetite increases, resulting in increased gastrointestinal burden, dysfunction; the temperature difference between day and night is large, a little inattention is easy to cause abdominal cold, or induced colon allergy, so that the intestinal peristalsis enhancement and lead to diarrhea; the human body immune function in the fall will be reduced. The human body is stimulated by cold air, the blood chemical composition of histamine acid increase, gastric acid secretion increase, gastrointestinal spasmodic contraction, so that the body’s resistance and adaptability and subsequently reduced, are very easy to trigger gastrointestinal diseases. Today we will take a look at the summer and fall intersection is very easy to attack the disease – chronic colitis. Chronic colitis chronic colitis (chroniccolitis), is a chronic, recurrent, multiple, due to a variety of pathogenic causes of intestinal inflammatory edema, ulceration, bleeding lesions. Narrowly defined as ulcerative colitis. Pathogenesis is not very clear, the lesions are limited to the mucosa and submucosa, common parts of the sigmoid colon, rectum, and even the entire colon. This disease is characterized by a long course, chronic recurrent episodes, abdominal pain, diarrhea as the main feature, mucus stool, constipation or diarrhea alternately occur, sometimes good and sometimes bad, lingering under the break, can be seen at any age, but to 20-30 years old young adults are common. Pathogenesis The etiology of chronic colitis is complex, and the most common causes are non-specific colitis, such as irritable bowel syndrome, inflammatory bowel disease, intestinal flora dysbiosis, and small intestinal malabsorption. It is generally believed that and infection, immune genetic, environmental, food allergies, defense dysfunction and mental factors. 1.Chronic diarrhea The degree of diarrhea varies in severity, in the light case, the daily bowel movement 3~4 times, or diarrhea and constipation alternately; in the heavy case, it can be once every 1~2 hours. Some patients may have diarrhea at night and/or after meals. When the rectum is severely involved, there may be a sense of urgency and heaviness. The feces are burnt, mixed with a lot of mucus, even with pus and blood. Recurrent abdominal pain Abdominal pain is mostly chronic, sometimes mild and sometimes severe, sometimes abdominal pain precedes diarrhea, sometimes accompanied by fever, nausea, abdominal distension, loss of appetite and other symptoms, abdominal pain can be umbilical or left lower abdomen. 3.Other manifestations Occasionally, arthritis, iridocyclitis, liver dysfunction and skin lesions are manifested. Due to prolonged attacks, patients often show weight loss and pallor, and there is often tenderness in the colon during abdominal examination during the active phase of the disease. There may be signs of acute abdomen with fever and decreased bowel sounds, especially in acute or fulminant cases. Clinical manifestations Examination 1, fiberoptic colonoscopy Diagnosis mainly relies on colonoscopy, because 90% ~ 95% of patients with rectum and sigmoid colon involvement. Early lesions can be seen in the microscopy of the intestinal mucosa with multiple erosions or superficial ulcers, can see congestion, edema mucosa, brittle and easy to bleed. In progressive cases, ulcers are seen, surrounded by raised granulation tissue and edematous mucosa, resembling polyps, or what may be termed pseudopolyp formation. In chronic progressive cases, the rectum and sigmoid colon lumen can be significantly reduced, in order to clarify the scope of the lesion, now commonly used colonoscopy for the whole colon examination, and at the same time for multiple biopsies in order to differentiate from Crohn’s disease colitis, tissue biopsy pathology diagnosis is the “gold standard” of chronic colitis. 2.Gas-barium enema double contrast imaging In barium enema imaging, we can see the disappearance of the colonic bag, the irregularity of the intestinal wall, the formation of pseudo-polyps, as well as the intestinal lumen thinning, stiffness. In cases with abdominal signs, barium enema should be avoided, and abdominal X-ray should be performed to observe whether there is toxic megacolon, colonic dilatation, and signs of free gas under the diaphragm. 3, fecal examination stool routine to see red, white blood cells and a small number of pus cells, detection of fecal toxins, and aerobic bacteria and anaerobic bacteria culture, stool culture without dysentery bacilli and amoebae, if the causative organisms can be found, it is one of the important basis for the diagnosis of chronic colitis. 4, blood biochemical examination, electrolyte disorders can be seen, often low potassium, low sodium and hypoproteinemia, serum protein can be less than 30g / L, white blood cell count can be as high as 20,000 or more, and to the neutrophils mainly.