The kidneys not only filter waste, toxins, and excess fluid from the body but also regulate crucial functions like electrolyte, mineral, and hormone balance. When kidney function declines, toxins and metabolic byproducts can build up in the blood, impacting various organs, including the skin.

Doctor Nguyen Thi Kieu Linh, from the Department of Nephrology - Dialysis at Tam Anh General Hospital Hanoi, notes that many kidney diseases advance silently over a long period, often without typical symptoms like swelling, abnormal urination, or fatigue. However, in certain instances, skin manifestations can emerge early, serving as a warning to detect the condition before kidney function significantly deteriorates.

Persistent skin itching

Persistent itching is a common skin symptom for individuals with chronic kidney disease. This sensation can affect a single area or the entire body, lasting constantly and often intensifying at night, disrupting sleep and daily routines. Experts attribute this to the buildup of waste products in the blood when the kidneys fail to filter them effectively. Prolonged itching can lead to excessive scratching, resulting in skin abrasions, bleeding, or even ulcers.

Doctor Linh advises patients on unusual signs warning of kidney disease. *Illustration: Tam Anh General Hospital*

Skin discoloration

The accumulation of toxins in the body can alter skin pigmentation. Patients' skin may appear grayer, pale, faintly yellow, or hyperpigmented. In some instances, white papules and nodules may emerge due to mineral metabolism disorders. These changes typically develop gradually, leading to them being easily overlooked or mistaken for the natural aging process.

Subcutaneous calcium deposits

The kidneys play a vital role in maintaining the body's calcium and phosphorus balance. When kidney damage occurs, this delicate balance can be disrupted, resulting in calcium deposits beneath the skin.

These deposits commonly appear near joints or in areas subject to significant pressure. While most cases are painless, they can occasionally cause discomfort, particularly when located on fingertips or other frequently moved body parts.

Dry, flaky skin

An imbalance of water and minerals in the body can compromise the skin's natural moisture, leading to rough, scaly, or cracked skin. This condition is prevalent among individuals with end-stage kidney disease, those undergoing hemodialysis, or post-kidney transplant recipients. Persistent dry skin causes discomfort and heightens the risk of irritation and itching.

Doctor Linh advises that if individuals experience persistent unusual skin signs, including prolonged itching, severe dryness, discoloration, or abnormal deposits without an apparent cause, they should seek medical consultation for a kidney function assessment. Early detection and timely treatment can slow the progression of kidney disease and mitigate the risk of complications.

Thu Giang