Heal-All (Prunella vulgaris) has a long history of traditional use in herbal medicine for various skin conditions, including dermatitis. In European, Chinese, and Native American herbal practices, the leaves and flowering tops of Heal-All have been applied topically as poultices, salves, or washes to soothe inflamed, irritated, or itchy skin. These traditional uses are based on the observation of the plant’s apparent anti-inflammatory and mild antimicrobial effects, as well as anecdotal reports of symptom relief in cases of eczema, minor wounds, and other dermatological issues.

Scientific research on Heal-All’s efficacy specifically for dermatitis is limited. Some laboratory studies have identified the presence of rosmarinic acid and other polyphenols in the plant, which exhibit anti-inflammatory and antioxidant properties [PMC5871180]. However, these studies are preliminary and mostly conducted in vitro (in test tubes or cell cultures) rather than in human clinical trials. There is no robust clinical evidence to confirm its effectiveness for dermatitis in humans.

In summary, the use of Heal-All for dermatitis is primarily justified by traditional herbal practices rather than strong scientific validation. Its reputation is supported by historical usage and preliminary phytochemical findings, but high-quality clinical trials are lacking.