Feeling Like Bugs Are Crawling Under Your Skin? Understanding the 4 Main Causes of 'Formication' and When to Seek Help

Formication, also known as the sensation of insects crawling, is an abnormal subjective perception where one feels ants or insects crawling, wriggling, or biting on or under the skin's surface without any physical stimulus. It is not a standalone disease but rather a clinical symptom of neurological or dermatological conditions. The common causes of formication can be summarized into the following four aspects: 1. Neurological Disorders: The most typical is Restless Legs Syndrome (RLS), where individuals experience a crawling or tingling sensation in their legs, especially when resting at night, which is relieved by movement. This is often linked to iron deficiency or dopamine abnormalities. Additionally, diabetic peripheral neuropathy, Vitamin B12 deficiency, or compression of the lateral femoral cutaneous nerve can also trigger this symptom. 2. Skin Diseases: Patients with moderate to severe atopic dermatitis often describe their intense itching as 'like ten thousand ants gnawing at their bones,' usually accompanied by localized redness and scaling. 3. Medications and Hormones: Side effects of certain psychiatric medications, a sudden drop in estrogen during menopause, or withdrawal from alcohol and drugs (like amphetamines) can cause this sensation. 4. Psychological Factors: Chronic stress and anxiety leading to autonomic nervous system dysfunction, or delusional parasitosis, which falls under psychiatric conditions. 💡 Medical Consultation and Improvement Tips: If symptoms primarily occur at night and are accompanied by an irresistible urge to move, consult a neurologist. If there is noticeable skin rash, see a dermatologist. In daily life, avoid staying up late, reduce caffeine and alcohol intake, and consider moderate leg stretching or warm compresses before bed to improve circulation.