Hemorrhoids are divided into external, internal and mixed hemorrhoids. External hemorrhoids are serious and can lead to perianal skin erosion, ulcers, itching, eczema and other symptoms; internal hemorrhoids are serious and can lead to hemorrhoidal nuclei prolapsing outside the anus and forming an incarcerated jammed, severe pain; Internal and external hemorrhoids are fused together to form mixed hemorrhoids, with both internal and external hemorrhoids at the same time; external hemorrhoids and internal hemorrhoids can lead to prolonged blood in the stool, making the patient anemic. External hemorrhoids are formed by pathological varicose, thrombosed or connective tissue proliferation of the subcutaneous venous plexus on the distal side of the dentate line of the anal canal. Repeated episodes of external hemorrhoids, serious condition can lead to patients with perianal skin erosion, ulcers, itching, eczema and other changes, causing pain at the anal opening, and may even lead to perianal infection, abscess. Internal hemorrhoids are formed by the expansion and varicose formation of the submucosal vascular plexus at the end of the rectum located above the dentate line of the anal canal. Serious internal hemorrhoids can lead to hemorrhoidal prolapse can not be returned to the incarceration, resulting in hemorrhoidal ischemia, necrosis, localized severe pain, swelling. Mixed hemorrhoids is the fusion of internal and external hemorrhoids, at the same time with the clinical manifestations of internal and external hemorrhoids. Mixed hemorrhoids are serious, in addition to the serious condition of internal and external hemorrhoids mentioned above, it is easier to form ring hemorrhoids, aggravating the condition and requiring emergency treatment. Whether external hemorrhoids, internal hemorrhoids or mixed hemorrhoids, can lead to long-term blood in the stool, which in turn leads to the patient due to anemia and appear pale, fatigue, panic and other symptoms. If you are suffering from hemorrhoids, it is advisable to seek prompt medical attention and ask your doctor to dispose of or treat it according to your specific condition.