What does it mean to have hair growing around the anus?

Nov 14, 2025 Source: Cainiu Health

Dr. Li Jingxiang

Introduction

It is normal for hair to grow around the anus, a physiological phenomenon that can occur in both males and females. It is primarily influenced by genetics and hormone levels, and serves to protect the perianal skin and reduce friction, so there is no need for excessive concern. If there is an abnormal increase in hair growth, or if it is accompanied by itching, pain, or skin lesions, medical consultation is recommended. The hair around the anus is part of the body's natural hair distribution.

It is normal for hair to grow around the anus, a physiological phenomenon that can occur in both males and females. It is primarily influenced by genetics and hormone levels, serving protective functions such as shielding the perianal skin and reducing friction. There is generally no need for concern. However, if there is abnormal hair growth accompanied by itching, pain, or skin lesions, medical advice should be sought promptly.

Hair around the anus is part of the body's overall body hair. Its growth is closely related to genetic factors. Individuals whose parents have thick body hair are more likely to develop anal hair, and the density may also be more pronounced—this is a genetically determined normal physiological trait.

After puberty, rising levels of androgens in the body stimulate the development of hair follicles around the anus, promoting hair growth, which is typically more noticeable in males than in females. This hair helps block dust, bacteria, and other foreign substances from entering the perianal area, reduces skin abrasion during bowel movements, and aids in evaporating local sweat to keep the anal region dry.

In daily life, maintaining perianal hygiene is important. Gently rinse the area with lukewarm water during showers, avoiding vigorous rubbing. Wear loose, breathable cotton clothing to minimize irritation to the perianal skin. There is no need to deliberately shave off the hair; if trimming is necessary for personal reasons, use clean tools to prevent skin injury.

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Can constipation and anal fissures heal on their own?

In general, whether constipation-related anal fissures can heal spontaneously mainly depends on the type and severity of the fissure. After developing an anal fissure, it is important to first determine its type rather than blindly waiting for self-healing. In daily life, avoid prolonged sitting to reduce pressure around the anus; avoid prolonged squatting during bowel movements and keep bowel movements brief. If the anal fissure persists for more than two weeks without healing, or if symptoms such as increased pain or heavier bleeding occur, prompt medical attention is necessary.

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Can patients with anal fissures run?

In general, whether patients with anal fissures can run depends on the severity of their condition and overall physical health. If there is obvious discomfort or worsening symptoms, prompt medical attention is recommended. Before running, individuals should assess their symptoms to determine the current stage of the condition. Wear loose, breathable clothing to minimize friction around the anus, and clean the anal area promptly after running to keep the area dry.

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Can a colonoscopy detect internal hemorrhoids?

A colonoscopy can detect internal hemorrhoids, clearly revealing their location, size, number, and mucosal condition, while simultaneously screening for other intestinal abnormalities. If symptoms such as rectal bleeding, anal heaviness, abdominal pain, or changes in bowel habits occur, prompt medical evaluation is recommended. Internal hemorrhoids are located at the distal end of the rectum near the anus, and a colonoscope can be inserted through the anus into the rectum and colon to directly visualize the morphological characteristics of the hemorrhoids.

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Is it true that nine out of ten men suffer from hemorrhoids?

If men frequently engage in prolonged sitting, excessive alcohol consumption, enjoy eating spicy and irritating foods, or suffer from irregular bowel movements or chronic constipation, these factors continuously irritate the blood vessels and mucous membranes around the anus, leading to venous plexus varicosity or anal cushion displacement, thereby increasing the risk of hemorrhoids. Such men exhibit the high incidence characteristics reflected by the saying "nine out of ten men suffer from hemorrhoids," and are more likely to develop the condition.