Nocturnal leg cramps really get in the way of a good night’s sleep. You might be sound asleep, possibly even dreaming, and bam! You wake up with a horrible charlie horse or, even worse, an iron-hard muscle contraction in your thigh or hamstring muscle. Then you have no chance of getting back to sleep until you can get the muscle to relax by stretching or massaging it. Perhaps you’ll need to hobble to the kitchen to swallow a spoonful of yellow mustard or dill pickle juice. That’s why we love soap in bed to keep those leg muscles from cramping in the first place.
Soap to Ease Nocturnal Leg Cramps:
Q. I recently heard from my vascular physician about using a bar of soap in between the sheets to alleviate nocturnal leg cramps.
Curious, I began charting the frequency of my leg cramps since I started using the bed soap. Now they are down to zero, as I have not had any leg cramps for the last three months. I am amazed. However, I just read I need to change the soap once the scent fades.
I am now a happy and well-rested woman who does not get up in the middle of the night because of extreme muscle cramping. Whatever it is, even if mind over matter, this method has worked for me.
How Could Soap Work Against Nocturnal Leg Cramps?
A. Thank you for sharing this story. We have been writing about putting soap under the bottom sheet for more than a decade. Hearing that a physician is recommending this home remedy is gratifying.
Actually, we do not think this is a placebo effect, though many people believe that is the explanation. A physician actually tested a skin patch containing soap scented oil to ease muscular spasms, menstrual cramps and the pain of fibromyalgia (Ough et al, Journal of Alternative and Complementary Medicine, July, 2008; Ough, Journal of Multidisciplinary Healthcare, Sept. 1, 2008). He got good results.
This physician hypothesized that soap scent had a biological effect. We agree, and have a possible explanation. Limonene is a common fragrance in soap. Scientists report that it may inhibit pain by activating special TRPA1 channels (Kaimoto et al, European Journal of Pain, Aug. 2016). Gradually, other scientists are beginning to consider the analgesic effects of herbal essential oils (International Journal of Molecular Sciences, Dec. 9, 2017).
Even if this explanation is incorrect, a bar of soap under the bottom sheet seems like a safe solution for a painful problem. We offer other possible remedies for nocturnal leg cramps in our Guide to Leg Pain.