I finally understand why French women swear by thermal water

It started with a rosacea flare that refused to go quietly. The kind that made even gentle skincare feel harsh. A friend mentioned thermal water, but I wasn’t convinced. I broke up with retinoids. Took a sabbatical from vitamin C. Even my favourite sunscreen stopped playing nice.

That’s when my dermatologist handed me a can. “Spray this. Nothing else,” she said. Somewhere between the second and third spritz, I understood why French women swear by this stuff. Most products ask for patience, for trust. This one didn’t. It didn’t need me to believe. It just worked.

The cult of the can

In France, thermal water isn’t just a mist. It’s a ritual. The kind of thing grandmothers pass down to granddaughters. You’ll find it in every pharmacy, fridge, and handbag—used post-wax, post-workout and maybe even post-breakup. It isn’t trend-driven or algorithm-approved. It’s survived decades of changing skincare dogma.

According to Dr Prachi Bodkhe, dermatologist at Envi Aesthetics, “Thermal water has anti-inflammatory properties due to minerals like calcium, magnesium, and selenium absorbed geothermally from rock beds. It’s especially beneficial when the skin is inflamed or the barrier is compromised—after lasers, peels, microneedling or in conditions like rosacea and eczema.”

What makes it different from micellar water or trending hypochlorous sprays? “Micellar water is more cleansing and hypochlorous sprays have antibacterial action. Thermal water mists are about calming and strengthening.”

The skin barrier’s friend

This becomes especially important when your skin is compromised. “After lasers, peels or microneedling, the top layer of skin is fresh and extremely sensitive,” explains Dr Bodkhe. “Using thermal water in these cases accelerates healing, reduces inflammation and prevents infection.” It’s also beneficial during flare-ups of eczema, rosacea or contact dermatitis—any moment when your skin feels hot, flushed and on the edge.

Dr Madhuri Agarwal, founder of Yavana Skin & Hair Clinic, adds, “There is research to show the effectiveness of thermal water in reducing skin sensitivity and irritation. Many of the French brands have a history of skin therapy in conditions such as eczema, rosacea and post-procedure skin.”

In fact, some thermal waters are classified as medicinal in France, backed by studies from their source towns. “Each has its own unique composition,” she notes, “and those properties have been carefully preserved and standardised in many products.”

The culture and history

Once upon a time, the idea of paying good money for a can of French water sounded absurd. Especially the kind sourced from sleepy European spa towns with names like Avène, La Roche-Posay or Vichy. But in France, the reverence for thermal springs runs deeper than skincare. Since Roman times, people have travelled to ‘cure towns’ like Vichy and Avène for therapeutic soaks, often prescribed by doctors for everything from arthritis to burns. These aren’t just rustic wellness retreats; they’re medical establishments, supported by national healthcare.