The product description mentions a 'cooling then warming' effect. What causes this sensation? — Camphor alcohol solution for external use

The two-part sensation is a direct result of the product's composition and how it interacts with your skin. The initial feeling of coolness comes from the evaporation of the alcohol base. As the liquid quickly dries, it draws heat away from the skin's surface, creating a refreshing, cooling effect. This is followed by the distinct warming sensation, which is caused by the camphor itself. Camphor acts on sensory receptors in the skin, which can trigger a local feeling of warmth and increased blood flow to the area. This sequence—quick-drying coolness followed by a deeper warmth—is characteristic of alcohol-based camphor solutions and is why they are often chosen for applications where such a stimulating, local effect is desired. It's a classic, time-tested interaction, not a medical treatment for any underlying condition.