Sudden buttock tingling is related to hemorrhoids and anal fissures. Hemorrhoids are divided into internal hemorrhoids and external hemorrhoids; internal hemorrhoids flare up with painless bloody stools as the main manifestation, while external hemorrhoids flare up with patients will not only be accompanied by growths in the anal area, but some people will also experience tingling around the anus. When people with external hemorrhoids eat spicy, irritating food, the stimulation of the food can lead to increased inflammation around the anus and induce an attack of the disease, and many people will have an anal tingling sensation accompanying an external hemorrhoid attack. Anal fissures are mainly caused by constipation. When constipated people defecate too fast or the volume of feces is too thick or the anal canal is narrow, it will cause the anus to be torn, and then not only a small amount of bleeding will occur, but also a severe pain around the anus that lasts for some time before it can be relieved. The pain can be relieved by taking a warm water bath and keeping the stool open to avoid aggravating constipation.