Ken D. Nguyen, MD · Oct 22, 2026
Anal Fissures: Painful Bowel Movements and Bleeding
An anal fissure is a small tear that causes sharp pain and bleeding with bowel movements. Learn causes, home care, prescription treatments, and when procedures help.
Ken D. Nguyen, MD · Jun 21, 2018
Hemorrhoid Banding (Rubber Band Ligation): How It Works, Results, and Risks
A detailed look at hemorrhoid banding (rubber band ligation): why it is painless, who is a candidate, how the CRH O'Regan suction ligator works, results compared with other treatments, risks, and aftercare.
Ken D. Nguyen, MD · Jun 17, 2018
Hemorrhoids: Causes, Symptoms, and Treatment Options
Hemorrhoids are swollen veins in the anus and rectum that cause bleeding, itching, and discomfort. Learn the types, causes, when to see a doctor, home care, and every treatment option from creams to surgery.
Ken D. Nguyen, MD · Oct 23, 2026
Rectal Bleeding: Common Causes and When to See a Doctor
Blood in the stool or on toilet paper has many causes, from hemorrhoids to polyps. Learn common causes, emergency warning signs, and when you need a colonoscopy.PPO & Medicare welcome
Our board-certified gastroenterologists are in network with most PPO plans, including Aetna, Anthem Blue Cross, Blue Shield of California, Cigna, and UnitedHealthcare, plus Medicare. Most PPO plans need no referral, and healthy adults 45 and older can often schedule a screening colonoscopy without an office visit.