Yeah, we know, you want a shower. Wash the rest of your stinky self, but keep the water and soap off your henna, you’ll thank us later. Why? Because water and soap interfere with the staining process, meaning you’ll still get stain, but it will be light and not last as long if you get it wet right away.
After 24 hours, shower as normal, but no hard scrubbing, loofah, or towel scrubbing on the henna as all those actions hasten exfoliation of dead skin, thereby hastening henna loss. And that’s not happy, that’s sad. Don’t be sad.
Swimming, especially in pools, also speeds exfoliation. Not saying don’t swim, just saying it’ll kill your henna faster. :-)