Doctors Warn Against Diagnosing Diabetes From Social Media Face Photos

Social media users are increasingly trying to diagnose diabetes by looking at people's faces in photographs, but medical experts warn this approach is inaccurate and misleading.

Medical Reality

Dr Rajiv Kovil, a diabetes and obesity specialist at Zandra Healthcare, clarifies that faces cannot provide blood sugar readings. Online claims often point to a red patch beside the nose as a sign of high blood sugar, but no medically recognised red nose-crease sign exists. Redness and scaling around the nose folds are common and can result from conditions like seborrhoeic dermatitis, rosacea, or contact dermatitis.

Skin Clues And Infections

While the face cannot offer a diagnosis, certain skin changes can indicate a need for a metabolic check-up. Acanthosis nigricans appears as darkened, thickened, velvety skin around the neck and body folds, which can point to significant insulin resistance before diabetes develops. Skin tags can also accompany type 2 diabetes and insulin resistance. Additionally, people with poorly controlled diabetes face a higher risk of fungal infections such as Candida, though these infections happen for complex biological reasons beyond the simplistic idea that sugar feeds fungus.

Eye Signs

Yellowish plaques near the inner eyelids, known as xanthelasma, represent lipid-laden cells and can point toward cardiometabolic risk or dyslipidaemia, though they can also occur in people without diabetes. Eruptive xanthomas, which appear as yellowish-red papules, can indicate severe hypertriglyceridaemia alongside uncontrolled diabetes. However, serious internal complications like diabetic retinopathy occur inside the eye rather than on the surface.

Context

Social media health trends often take genuine medical concepts, such as metabolic skin markers, and oversimplify them into direct home-diagnosis tools. Doctors stress that while skin changes can serve as useful clues prompting a laboratory test, they never replace proper medical evaluation.