A lot of guys spend time thinking (or worrying) about the hair on their head but next to none thinking about the skin underneath it. That’s a mistake. Your scalp collects sweat, oil, dead skin and styling product just like the rest of your skin does, and giving it a little attention can work wonders for you. Just like any type of massage, a scalp massager first and foremost, feels amazing. But there could be other reasons to integrate a massaging scalp brush into your regular routine.

Besides the ASMR-like tingly pleasure, these scalp massagers can help with everything from reducing dandruff and removing excess product, to increasing blood flow to the area, which can help stimulate healthy hair growth. Just keep in mind that these brushes can support a healthier scalp environment, but it won’t be a magic cure for thinning hair.

The real question is how much ritual (and technology) you want. A simple manual tool handles exfoliation and stimulation surprisingly well. Spend more and you get powered massage and customizable intensity. At the top end, red-light therapy and app-controlled treatments turn the whole thing into a dedicated hair-care regimen. Here’s what you actually gain at each level.