Jan 11, 2024 · What causes narrow stools? Should I be concerned? Narrow stools that happen now and then probably are harmless. But in some cases, narrow stools — especially if pencil thin — may be a …

Dec 23, 2025 · Causes Scar tissue, which can narrow the urethra, can be due to: A medical procedure that involves putting a tool, such as an endoscope, into the urethra. A tube that's put into the urethra …

Apr 16, 2024 · Valvuloplasty A valvuloplasty is a treatment to repair a heart valve that has a narrowed opening. Narrowing of a heart valve is called valve stenosis. Four heart valves — the aortic, mitral, …

Aug 9, 2024 · Plaque can cause arteries to narrow, blocking blood flow. In PAD, plaque collects in the arteries of the arms or legs. Less common causes of PAD include: Swelling and irritation of blood …

Aug 27, 2025 · Possible side effects of narrow band ultraviolet B therapy include redness, itching and burning. These side effects usually clear up within a few hours after treatment. Combining psoralen …

Mar 7, 2025 · "Bad" cholesterol builds up in the walls of arteries. This makes the arteries hard and narrow. When a gene change causes high cholesterol, the body has trouble removing LDL …

Nov 8, 2023 · Tumor inside the airway. A growth, which may or may not be cancer, can narrow or block the airway. Possible causes of atelectasis due to pressure from outside the lung include: Injury. …

Apr 8, 2025 · Osteoarthritis is the most common form of arthritis, affecting millions of people worldwide. It happens when the protective cartilage that cushions the ends of the bones wears down over time. …

Aug 6, 2025 · It might even take on an hourglass-like shape, with a tight, narrow band around the shaft. The curving and penile shortening linked with Peyronie's disease might become worse over time.

Jul 12, 2025 · Renal artery stenosis is when one or more arteries that carry blood to the kidneys narrow. These are called the renal arteries. Having narrowed renal arteries means the kidneys don't get …