If you are looking for an add-on that brings warmth, flowing water, botanical aroma, and a slower pace into your scalp-care ritual, Water Flow at Siesta Head Spa is designed for exactly that. This service was previously introduced in our content as Head Onsen, a name many guests still search for. Today, Water Flow is the service name we use at Siesta.
Water Flow is selected after a primary Head Spa program. Warm hydrosols flow gently over the scalp while the therapist works with the rhythm and pressure of Thai-inspired hand techniques. The aim is to complement cleansing, scalp comfort, and relaxation without adding unnecessary steps.
What Is Water Flow, or Head Onsen?
The experience takes inspiration from the warmth and stillness associated with Japanese onsen culture, then adapts the idea for Head Spa. Instead of immersing the body, Water Flow uses a continuous stream of warm botanical water around the scalp. Guests may recognize the concept as Head Onsen, while Water Flow is its current name at Siesta.
The Role of Hydrosols in Water Flow
Hydrosols, also called hydrolates or floral waters, are water-based products collected during the steam distillation of aromatic plants. They contain water-soluble plant compounds and small amounts of volatile aromatic components. Their composition is gentler and more dilute than an essential oil, which is why hydrosols have long been used in cosmetic and botanical-care preparations.
At Siesta, the Water Flow blend may include hydrosols such as rosemary, lavender, chamomile, and bergamot. The warm flow, botanical aroma, and therapist-led scalp care work together as one sensory experience.
Hydrosols Used in the Water Flow Experience
- Rosemary Hydrosol
- Scalp freshness and oil balance: Rosemary hydrosol is selected to support a fresh, comfortable scalp-care experience.
- Stimulates hair growth: Rosemary-derived preparations have been studied for their potential role in hair and scalp care. The available clinical research is mainly on rosemary oil rather than hydrosol, so individual results may vary.
- Lavender Hydrosol
- A calm aromatic experience: Its familiar botanical scent complements the slower rhythm of Water Flow and may support relaxation.
- Gentle botanical care: Lavender hydrosol is used as part of the diluted, water-based blend rather than as a concentrated essential oil.
- Chamomile Hydrosol
- Comfort for the scalp: Chamomile is traditionally associated with soothing botanical care and complements a gentle Water Flow experience.
- Soft aromatic character: Its mild scent supports the calm, unhurried feeling of the treatment.
- Bergamot Hydrosol
- Fresh sensory finish: Bergamot adds a light citrus note that makes the warm-water experience feel clean and refreshing.
Benefits of Water Flow for the Scalp and Hair-Care Experience
Water Flow combines hydrosols, warm water, and therapist-led hand techniques to support a thorough and relaxing scalp-care experience. Guests may notice a fresher scalp, softer-feeling hair, and a deeper sense of relaxation after the service. Some clients also report reduced hair fall as part of their ongoing scalp-care routine, although hair shedding has many possible causes and results differ from person to person.
How Does the Warm Hydrosol Flow Enhance the Experience?
The warmth and continuous flow help loosen surface oil and product residue while creating an even, soothing sensation around the scalp. The temperature is kept comfortable, and the therapist adjusts the service according to the guest’s scalp condition and preferences. Water Flow supports the cleansing and relaxation steps of the main Head Spa program rather than replacing them.
Adding Water Flow to Your Main Head Spa Program
Water Flow is an add-on service and is selected together with a primary Head Spa program. The combination allows the therapist to complete the essential cleansing and scalp-care steps first, then use the warm hydrosol flow as a calm, sensory extension of the experience.
FAQs About Water Flow, Head Onsen, and Hydrosols
- Is Water Flow the same service as Head Onsen?
- Yes. Head Onsen is the earlier name and concept used in our content. The current service name at Siesta is Water Flow.
- How do hydrosols support the scalp-care experience?
- Hydrosols are dilute, water-based botanical distillates. In Water Flow, they add gentle aroma and botanical character while warm water supports the cleansing and relaxation steps.
- Can I add Water Flow to any Head Spa program?
- Water Flow is available as an add-on to a primary Head Spa program. Our team can help match it with the most suitable program for your visit.
- Is Water Flow safe for sensitive scalps?
- Absolutely. Our hydrosol blend is gentle and designed for all scalp types, including sensitive skin.
References
- Multistep Approach Points to Compounds Responsible for the Biological Activity and Safety of Hydrolates from Nine Lamiaceae Medicinal Plants on Human Skin Fibroblasts
- Rosemary Oil vs Minoxidil 2% for the Treatment of Androgenetic Alopecia: A Randomized Comparative Trial
Research on rosemary oil or laboratory-tested hydrolates does not establish identical outcomes for every Water Flow session. The references provide context for the ingredients discussed above.
Updated: October 10, 2026
Siesta Head Spa and Salon
The First Authentic Thai Head Spa
Branches and Opening Hours
Open daily: 10:00 AM – 8:00 PM
📍 Siesta Head Spa – Emsphere Branch
📞 Call / WhatsApp: +66-88-681-0791
📍 Siesta Head Spa – Gaysorn Amarin Branch
📞 Call / WhatsApp: +66-88-992-2977
📱 LINE: @Siesta
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🌐 Website: siestaheadspa.com
