My girlfriend left a small, amber-colored stick at my place, and at first, I had absolutely no idea what it was. It was smooth, shiny, and golden-brown, which made me think it might be some kind of beauty or self-care tool. I even wondered if it was one of those things better left unmentioned to avoid an awkward conversation. After doing a little research, I discovered that it was actually a resin foot massage stick, sometimes called a foot roller or massage rod.

The idea behind it is surprisingly simple. You place the stick on the floor, put your bare foot over it, and slowly roll your foot from the heel toward the toes. The raised ridges gently press into the sole, particularly around the heel, arch, and ball of the foot. People who spend a lot of time standing, walking, running, or working on their feet often use tools like this to help relieve feelings of tension and tiredness.

Using the roller is easy and requires no batteries or complicated setup. You can roll each foot back and forth for a few minutes, spending a little more time on areas that feel especially tight. Some people use one after a long day at work or before going to bed, while others keep it nearby under their desk. Although it can provide a pleasant, massage-like sensation and may help relax tight areas, it should not be considered a cure for serious foot problems.

It’s also important to use it gently, especially when trying it for the first time. Avoid rolling over injured, swollen, bruised, or particularly painful areas. Anyone with diabetes, nerve problems, poor circulation, or ongoing foot pain should consult a doctor or physical therapist before using one. So, it turns out my girlfriend wasn’t hiding some mysterious beauty gadget after all—it was simply a foot massage stick, and after trying it myself, I could understand why she had one.