Expert Q&A

WHO: don’t touch your face it’ll spread coronavirus. *Diabetics who lick their finger after a finger prick — how a functional medicine approach differs

The Habit of Licking Fingers in Diabetes Management

As someone who has guided thousands through sustainable weight loss at CFP Weight Loss, I see this question often: public health officials warn "don't touch your face" to limit coronavirus spread, yet many people with diabetes habitually lick their finger after a finger prick blood glucose test. This isn't just a quirky habit—it's a deeply ingrained behavior that can introduce bacteria and affect long-term metabolic health. For adults aged 45-54 juggling joint pain, hormonal shifts, and blood pressure concerns, these small daily actions matter more than most realize.

Why People Lick Their Fingers After Testing

The impulse comes from needing just enough blood for older glucometers or simply from convenience. Many of my clients admit embarrassment about this habit, especially after failed diets left them distrustful of new approaches. Licking transfers saliva enzymes that can alter readings slightly, but more critically, it bypasses basic hygiene. In the era of heightened infection awareness, this practice raises risks of introducing oral bacteria into small puncture wounds. For those managing diabetes alongside obesity, repeated micro-inflammation adds to the burden on already stressed systems.

How a Functional Medicine Approach Differs

Unlike conventional advice that simply says "stop it," my methodology in The CFP Weight Loss Method looks at root causes. We examine insulin resistance, cortisol patterns from chronic stress, and nutrient gaps that drive cravings or poor impulse control. A functional medicine lens asks: Is poor blood sugar stability making you reach for quick comforts? Are hormonal changes in perimenopause or andropause worsening inflammation? We replace the habit with better tools—continuous glucose monitors that reduce pricks by 80%, proper lancet technique training, and alcohol wipes that don't sting sensitive skin. Clients learn to stabilize glucose through timed protein-rich meals that take just 10 minutes to prep, fitting busy schedules without complex plans.

Practical Steps for Lasting Change

Start by tracking when you feel the urge—often it's tied to low energy or anxiety. Swap to a meter requiring tiny samples (0.3 microliters versus older 1-2 microliter models). Incorporate anti-inflammatory foods like wild salmon or turmeric to ease joint pain that makes movement hard. In our program, we address the full picture: lowering A1C naturally while shedding pounds insurance won't cover. One client reduced finger pricks from four to one daily and lost 27 pounds in 90 days by balancing her gut microbiome, which directly influences sugar cravings. Remember, small consistent changes build trust after years of diet failures. Focus on metabolic flexibility rather than perfection, and the habit fades naturally.

By understanding the "why" behind behaviors, functional medicine empowers real transformation without shame. This integrated path supports diabetes, blood pressure, and weight goals even when life feels overwhelming.

💬 What the Community Says

In online diabetes and weight loss forums, members frequently discuss the finger-licking habit with a mix of guilt and practicality. Many in their late 40s and early 50s share that they've done it for decades, especially with older meters, and worry about infection risks highlighted during the pandemic. A common sentiment is frustration with blanket hygiene warnings that don't account for the realities of daily testing when joints hurt or time is short. Some report switching to CGMs helped eliminate the issue entirely, while others debate whether occasional licking truly impacts A1C readings. There's lively discussion around functional medicine versus standard care, with users appreciating approaches that examine stress and hormones rather than issuing strict rules. A vocal minority admits embarrassment asking doctors about it, preferring anonymous community advice on building better routines without feeling judged after multiple diet failures.
Clark, R. (2026). WHO: don’t touch your face it’ll spread coronavirus. *Diabetics who lick their f. *CFP Weight Loss*. https://blog.cfpweightloss.com/ask/who-don-t-touch-your-face-it-ll-spread-coronavirus-diabetics-who-lick-their-finger-after-a-finger-prick-how-a-functional-medicine-approach
Russell Clark, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

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