By: Dr Tariq Jagnarine
Fam Med, Endocrinology/ Diabetes
Almost everyone has experienced itchy skin at some point. Whether it is caused by a mosquito bite, dry weather, or an allergic reaction, itching is usually temporary and harmless. However, when itching becomes persistent, widespread, or occurs without an obvious rash, it may be your body’s way of signalling that something more serious is happening.
As a family physician, I have cared for many patients who initially sought help for persistent itching, only to discover an underlying medical condition such as diabetes, kidney disease, liver disease, thyroid disorders, or iron deficiency. This is why persistent itching should never be ignored, especially when it lasts for several weeks or interferes with daily life.
What Is Itching?
Itching, medically known as pruritus, is an unpleasant sensation that triggers the urge to scratch. While scratching may provide temporary relief, it often worsens skin irritation and can lead to infections, scarring, and further inflammation.
Itching can affect one small area of the body or become widespread, involving the entire skin surface.
Common Causes of Itchy Skin
Dry Skin (Xerosis)
Dry skin is one of the most common causes of itching, particularly in older adults. Frequent bathing with hot water, harsh soaps, air conditioning, and low humidity can strip the skin of its natural oils.
Allergic Reactions
Allergies to soaps, detergents, fragrances, cosmetics, medications, foods, or plants may cause itching accompanied by redness or a rash.
Skin Conditions
Several skin disorders commonly present with itching, including:
• Eczema
(atopic dermatitis)
• Psoriasis
• Contact dermatitis
• Urticaria (hives)
• Scabies
• Fungal infections
These conditions often require specific treatment and should not be self-diagnosed.
When Itching May Be a Sign of Internal Disease
Sometimes the skin appears normal, yet the itching persists. This may indicate an underlying medical condition.
Chronic Kidney Disease
Persistent generalized itching is common in people with advanced kidney disease, especially those receiving dialysis. Waste products that accumulate in the blood may contribute to this symptom.
Liver Disease
Diseases affecting the liver or bile ducts may cause severe itching, sometimes before jaundice develops. This occurs because bile salts accumulate in the skin.
Diabetes
High blood sugar levels can cause dry skin, poor circulation, and nerve damage, all of which may contribute to itching.
Thyroid Disorders
Both hypothyroidism and hyperthyroidism may cause changes in the skin that lead to persistent itching.
Iron Deficiency
Low iron levels may present with generalized itching even before anemia becomes severe.
Blood Disorders and Cancer
Although less common, persistent unexplained itching can occasionally be associated with blood disorders such as lymphoma or polycythemia vera. This is why long-standing itching without an obvious cause should be medically evaluated.
Medications Can Also Cause Itching
Certain medications may trigger itching as a side effect, including:
• Some antibiotics
• Opioid pain medications
• Aspirin and other anti-inflammatory drugs
• Blood pressure medications
Never stop a prescribed medication without consulting your healthcare provider.
When Should You See a Doctor?
Seek medical attention if itching:
• Lasts longer than two weeks
• Is severe enough to disturb sleep
• Occurs without a visible rash
• Is associated with weight loss, fever, or night sweats
• Is accompanied by yellowing of the skin or eyes
• Does not improve with basic skin care
These symptoms may require blood tests or further investigation.
How Can You Relieve Itching?
Simple measures often help relieve mild itching:
• Use fragrance-free moisturizers daily.
• Avoid hot showers and use lukewarm water.
• Choose mild, fragrance-free soaps.
• Wear loose cotton clothing.
• Stay well hydrated.
• Keep your home cool when possible.
• Avoid scratching, as it can damage the skin and increase the risk of infection.
For persistent symptoms, your healthcare provider may recommend medicated creams, antihistamines, or treatment directed at the underlying cause.
One of the most important lessons I have learned in medicine is that symptoms should never be dismissed simply because they appear minor. Persistent itching may seem like a small inconvenience, but I have seen it become the first clue to serious illnesses that otherwise had no obvious symptoms. Medicine is about listening, not only to our patients but also to what the body is trying to communicate. Sometimes the skin speaks before blood tests do.
For this reason, I encourage patients not to ignore persistent itching. Seeking medical advice early may lead to the diagnosis of a condition that is far easier to treat in its early stages.
Not every itch is a cause for concern, but persistent or unexplained itching deserves attention.
Your skin is one of the body’s earliest warning systems. When itching continues despite moisturizers or over-the-counter treatments, it may be time to look beneath the surface.
Remember, treating the itch is important, but identifying the cause is even more important.
If your skin keeps sending the same message, don’t ignore it.
The post Understanding Persistent Itching and When It May Signal an Underlying Health Condition appeared first on Guyana Times.
