What Are the Symptoms of Anal Cancer?
Aug 24, 2022
Source: Cainiu Health
Dr. Cheng Yicheng
Introduction
Anal cancer is a malignant tumor of the anus. In general, the primary symptoms of anal cancer include rectal bleeding—intermittent and either dark red or bright red in color—anal pain, and severe pain when complications such as prolapse occur. Patients may also experience a sense of urgency during defecation when bowel habits change. The most prominent manifestation is narrowing of the stool, and perianal pruritus (itching around the anus) may develop.
Cancer is an extremely frightening disease in daily life. Current medical technology remains highly limited in treating cancer. Generally, patients experience worsening cancer-related symptoms and increased side effects during treatment. Therefore, it is strongly recommended that individuals pay greater attention to understanding anal cancer. So, what are the symptoms of anal cancer?
What Are the Symptoms of Anal Cancer?
Anal cancer is a malignant tumor arising in the rectum. Typically, the primary symptoms of anal cancer include rectal bleeding—intermittent, dark red or bright red in color—anal pain, and severe pain associated with complications such as prolapse (intussusception) of tissue. When changes occur in bowel habits, patients may experience tenesmus (a persistent, painful urge to defecate). The most prominent sign is stool narrowing (thinning), accompanied by perianal pruritus (itching around the anus). Anal cancer most commonly originates in the anal canal or perianal skin and is predominantly squamous cell carcinoma; basal cell carcinoma is rare. Common predisposing factors include anal fistulas, post-acne surgical scars, chronic moisture exposure, and long-term chronic irritation—all of which may contribute to the development of anal cancer. Typical presenting symptoms include anal discomfort, pruritus ani, and pain.
The earliest symptom of anal cancer is often rectal bleeding—blood appearing before or after bowel movements—which can easily be mistaken for hemorrhoids. Thus, when blood appears in the stool—or when drops of deep-red blood are observed before or after defecation—do not dismiss it lightly. Prompt medical evaluation, including a digital rectal examination and/or anoscopy, is essential to determine whether the source is a malignancy or hemorrhoidal disease. Additionally, some anal cancer patients may not present with bleeding; instead, they experience significant anal pain and marked perianal swelling, caused by tumor-induced irritation or impaction within the anal canal.
Patients should avoid consuming spicy or irritating foods, alcohol, pickled products, and grilled or barbecued foods, as these may excessively stimulate the anal region and potentially exacerbate perianal malignancy. It is crucial to maintain a balanced, nutritious diet—avoiding selective or restrictive eating habits—to support overall health, strengthen immune function, and enhance the body’s capacity to combat disease. We hope this information proves helpful to you.
