Dr. Stephen J Knohl MD

What is shivering?Exposure to cold or rapid shifts in temperature usually causes uncontrollable shivering. However, many other possible causes can cause shivering or chills. An uncontrollable shivering that persists for a longer time may indicate an underlying illness that requires immediate medical...

What is dysuria?Dysuria is the medical term for painful urination or a burning sensation, discomfort, or difficulty when passing urine. In most cases, dysuria is a symptom of another medical condition. Males and females of any age can experience dysuria. However, this symptom is more common in...

A renal ultrasound is actually a diagnostic procedure, wherein high-frequency sound waves are transmitted through the body tissues that are inaudible to the human ear. The echoes recorded into videos or images of the internal structures of the body.A wide range of diseases and conditions can be...

Kidney stones are also known as renal calculi. The occurrence of kidney stones is known as nephrolithiasis. Kidney stones in the urinary tract lead to a condition known as ureterolithiasis. Kidney stones are seen as a common occurrence in the medical world. One in twenty people tend to suffer from...

Kidney stones are a condition that affects around 15 percent of the world's population. For reasons unknown, the condition's prevalence has increased over the last 30 years. Kidney stones more often affect men than women. What are kidney stones?Kidney stones or renal lithiasis is the formation of...

Oliguria is a medical term used when referring to a decreased urine output. Oliguria is considered when a person’s urine output is less than 400 mL in a 24-hour period. When it comes to infants, oliguria occurs when the urine output is less than 0.5 mL/kg/hr for 24 hours. Anuria is the absence...