Dealing with relentless itchy skin that won’t go away? If it lasts for more than six weeks, you might be experiencing chronic pruritus—a condition that could signal an underlying health issue. From skin disorders to internal diseases, several factors can contribute to persistent itchy skin. 

Identifying the root cause is the first step toward effective relief. Here are five crucial tests that can help diagnose the issue.

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Key Diagnostic Tests Include:

1. Kidney Function Tests (BUN, Creatinine)

Your kidneys play a vital role in filtering waste from your blood. When they’re not functioning properly, toxins can build up in your body, potentially triggering chronic pruritus. A simple blood test measuring Blood Urea Nitrogen (BUN) and creatinine levels can assess kidney health and determine if they’re contributing to your symptoms.

2. Liver Function Tests (LFTs)

The liver is another key organ responsible for detoxifying your body. Liver diseases like hepatitis or cirrhosis can cause a buildup of bile salts in the skin, leading to persistent itching. An LFT panel checks enzyme levels and overall liver function to detect any abnormalities.

3. Thyroid Panel (TSH, T3, T4)

An imbalanced thyroid can do more than affect your metabolism—it can also cause excessive dryness and itching. Hypothyroidism, in particular, is often linked to chronic pruritus. A thyroid panel evaluates hormone levels to see if your thyroid is contributing to your discomfort.

4. Blood Sugar Levels

Uncontrolled diabetes can lead to nerve damage and poor circulation, both of which may cause ongoing itching. Checking blood sugar levels can help rule out diabetes as a potential cause of chronic pruritus.

5. Complete Blood Count (CBC)

A CBC test provides insights into infections, deficiencies, or blood disorders that might be triggering your itching. Low iron levels, for example, are commonly associated with chronic pruritus, making this test an essential part of the diagnostic process.

When Should You See a Doctor?

If you’ve been experiencing persistent itching, don’t ignore it. In some cases, a skin biopsy may also be needed to diagnose conditions like eczema, psoriasis, or other rare skin disorders. Consulting a dermatologist early can prevent complications and help you get the right treatment before the issue worsens.

Want to discuss this topic with experts? Join with dermatologists in our SkinBB Community. 

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