Ask a doctor - What causes itching sensation?

Q. What causes itching sensation?

Doctor Answer is medically reviewed by SecondMedic medical review team.

Answered by Secondmedic Expert

Itching sensation, also known as pruritus, can be caused by a variety of factors. It's your body's way of signaling that something isn't quite right. Here's a breakdown:

1. Skin Irritants: One of the most common causes of itching is contact with irritants like certain fabrics, chemicals in soaps or lotions, or even plants like poison ivy. These substances can trigger an allergic reaction in your skin, leading to itchiness.

2. Dry Skin: When your skin lacks moisture, it can become dry and flaky, which often leads to itching. This is especially common in colder months when indoor heating can further strip moisture from your skin.

3. Insect Bites: Mosquitoes, bed bugs, fleas, and other insects leave behind saliva or venom when they bite, which can cause an itchy reaction in your skin.

4. Allergies: Allergic reactions to foods, medications, or environmental allergens like pollen or dust mites can sometimes manifest as itching, along with other symptoms like hives or swelling.

5. Skin Conditions: Various skin conditions such as eczema, psoriasis, dermatitis, or fungal infections can cause persistent itching. These conditions often involve inflammation and can be exacerbated by factors like stress or certain foods.

6. Nerve Disorders: In some cases, itching may be a result of nerve disorders like neuropathy or conditions that affect the nervous system, such as diabetes or multiple sclerosis.

7. Internal Health Issues: Certain internal health problems like liver disease, kidney failure, thyroid disorders, or blood disorders can sometimes lead to itching as a symptom. This occurs due to the buildup of toxins in the body or imbalances in hormone levels.

8. Psychological Factors: Stress, anxiety, and even boredom can sometimes trigger itching sensations. It's believed that these emotions can disrupt the normal functioning of neurotransmitters in the brain, leading to heightened sensitivity to itch stimuli.

It's essential to identify the underlying cause of itching to effectively manage and treat it. If itching persists or is accompanied by other concerning symptoms, it's best to consult with a healthcare professional for proper evaluation and treatment. In the meantime, avoiding known triggers and practicing good skincare habits like moisturizing regularly can help alleviate discomfort.