The Claim
"Dabbing toothpaste on a pimple overnight will dry it out faster."
The Science
This home remedy has been passed down for generations, and while there is a kernel of logic behind it — older toothpaste formulations contained triclosan, an antibacterial agent — modern toothpaste is formulated for teeth, not skin. The ingredients that make toothpaste effective at cleaning teeth are actively harmful to facial skin.
Toothpaste contains sodium lauryl sulfate (a harsh surfactant), fluoride, and various whitening agents that can cause contact dermatitis, chemical burns, and significant irritation when applied to broken or inflamed skin. The drying effect people experience is not therapeutic — it is the skin's barrier being stripped and damaged, which can lead to post-inflammatory hyperpigmentation and scarring.
Modern spot treatments containing benzoyl peroxide (2.5-5%) or salicylic acid (2%) are specifically formulated for treating acne lesions. They target acne-causing bacteria and excess sebum without damaging the surrounding skin. Hydrocolloid pimple patches are another excellent option — they absorb wound fluid, protect the lesion from picking, and create an optimal healing environment.
Key Takeaway
Toothpaste contains ingredients that irritate and damage skin. Benzoyl peroxide or salicylic acid spot treatments are far more effective and safe.
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