Rectal Itching & Bleeding in Women: Differential Diagnosis & When to See a Doctor

Rectal itching (pruritus ani) and bleeding are common but never normal. They require evaluation to exclude serious pathology.

Common Causes

Condition	Key Features
Hemorrhoids	Painless bright red blood on paper/toilet; itching, prolapse (Gr I–IV); thrombosed = acute pain
Anal Fissure	Sharp tearing pain during/after BM; bright blood on paper; sentinel tag; often posterior midline
Pruritus Ani (Primary)	Intense itching, no primary lesion; hygiene extremes, irritants, moisture, dietary (caffeine, spicy)
Infections	STIs (HSV, HPV, syphilis, gonorrhea), pinworm (nocturnal itch), candidiasis, bacterial
Inflammatory Bowel Disease	Crohn's/UC: bleeding, diarrhea, pain, weight loss; perianal fistulas, tags (Crohn's)
Colorectal Cancer	Bleeding ± change in caliber/habits, weight loss, anemia; screening from 45
Rectal Prolapse	Mucosal/full-thickness protrusion; mucus, soiling, bleeding
Dermatoses	Psoriasis, lichen sclerosus, contact dermatitis, hidradenitis

Red Flags for Urgent Evaluation

• Age ≥45 (or <45 with risk factors) + rectal bleeding
• Change in bowel habits + bleeding
• Weight loss, anemia, abdominal mass
• Family history CRC / Lynch / FAP

Diagnostic Workup

• Anoscopy, flexible sigmoidoscopy, colonoscopy
• STI testing if indicated
• Biopsy for suspicious lesions

Do not self-treat with OTC hemorrhoid creams long-term without diagnosis. Many conditions mimic hemorrhoids.