6 Reasons Your Feet Are So Itchy
So you had a whole day without a single itchy peep from your feet. And when you get into bed at night, all of a sudden your feet start itching. You scratch the spot and go back to resting. But the itch isn't done. So you repeat. Repeat. Get frustrated. Toss. Turn. Repeat.
Why is it that your feet seem to suddenly itch at night? Not like you're wearing itchy socks. Not like your sheets are any different than they were last night. So what's up?
Certain theories tend to get trotted out about itchy feet at night. 'There are some common assumptions about it that probably aren’t correct,' says Brian S. Kim, M.D., vice chair of research, department of dermatology, at the Icahn School of Medicine at Mount Sinai in New York, co-director at the Centre for the Study of Itch at Washington University School of Medicine. One classic hypothesis that gets bandied about is that people are less distracted at night and all of a sudden tune into the itch. 'I don’t think it’s that simple,' says Dr. Kim. That said, it's not entirely clear what a more accurate answer is yet.
Why Your Feet Itch at Night
One newer hypothesis is that nighttime itching could be a result of end-of-day changing circadian rhythms, Dr. Kim says. At night, the anti-inflammatory chemicals in your body are lower, and they may have to do with regulating the sensitivity of itching. 'You may get a cleaner kind of signal from a nighttime itch,' he says.
Evolutionarily, that stronger, cleaner itch signal at night might have served us well. 'I’m getting really speculative here, but if you don’t move at all at night, you may be more susceptible to getting infestations with mites, or even getting bitten by mosquitoes,' says Dr. Kim.
Ask why people’s feet, in particular, itch and dermatologists take a deep breath, because there can be a huge number of drivers. Some are very simple, others not so much. Causes can include:
Athlete’s Foot
'When a patient comes in and complains of itchy feet, the first thing a dermatologist usually does is look between the toes to see if there’s redness, cracking, flaking, or scaling,' says Shawn Kwatra, M.D., assistant professor of dermatology at Johns Hopkins Medicine. Those often indicate athlete’s foot, and remedies include keeping your feet as dry as possible—that might include powder and/or moisture-wicking socks—and using an over-the-counter anti-fungal product.
Common athlete's foot products include the ingredients terbinafine or clotrimazole. These come in many different formats—creams, powders, sprays—and you may need to experiment a bit to figure out which works best for you, according to the Mayo Clinic. And give it some time to clear up: it could take as long as four weeks, but it also might clear up a lot sooner than that. (Random fact if you're dealing with this: Be careful when you put your underwear on. If your feet are infected with athlete's foot, the fungus can catch a ride on your underwear and end up giving you jock itch.)
Dry Skin
'As you get older, you have less of an ability to retain water in the outer layer of skin,' says Dr. Kwatra. On top of that, since you’re walking on your feet all day, the skin there can be thickened and dry, anyway. All of which adds up to extra itch on your feet. Help stop it by applying moisturising cream—the kind that comes in a jar—on your feet at night. 'Cream is more moisturising than lotion,' Dr. Kwatra points out. 'The more gooey it is, the more moisturising it is.'
Skin Conditions Including Eczema and Psoriasis
These usually make other parts of your body itchy, and the feet aren’t exempt from feeling it. For psoriasis, especially, it's worth seeing a doctor. There are different types of psoriasis, and there are many different treatments. Some people may get relief through topical creams, especially if only small amounts of their bodies are affected. Others may benefit from phototherapy (ultravioletlight therapy). And there are oral and injected medications as well, so you can see why it's important to have a pro on your side.
If you think eczema is what's bothering you—some of the symptoms include dry, cracked skin; raw, sensitive skin from scratching; small bumps on brown or Black skin; thickened skin; oozing and crusting, according to the Mayo Clinic—get it checked so you can get the right relief. Don't just buy a moisturiser and keep on scratching if it doesn't offer relief. Dermatologists have numerous tools to help eczema bother you less.
Other Medical Problems
Nerve damage caused by unchecked diabetes can cause itching in the feet, as can liver disease. Sometimes, Dr. Kwatra says, 'itch on the body can be a harbinger of underlying illness.' Most of the time, itch that hints at an underlying illness won’t just be in your feet. 'Take it in context with the rest of your health,' he says. In other words, not every itchy foot is going to be the sign of a big issue like these, but if itchy feet are a consistent and long-standing problem for you, get yourself checked out, says Dr. Kwatra.
Systems We Haven’t Even Figured out Yet
'Itching may be a result of multiple system failures,' says Dr. Kim. Itch may not just be one symptom, there may be many forms of itch. 'Itch is almost a field of medicine onto itself,' he says. And only the surface has been scratched, so to speak.
Research on why scratching the itch is satisfying—at least until the itch resurfaces and you scratch again and again—suggests that scratching creates a little bit of pain. That drowns out the itching sensation. To dull the pain feeling, your brain releases serotonin, the theory goes, making itching feel good and satisfying. At least until the itch/scratch/itch/scratch cycle seems never ending.
How to Stop Itchy Feet at Night
The toolbox for stopping that annoying itch—if it's not an issue you need to see a doctor for—is pretty straightforward:
Use moisturiser. If your feet are extra dry, use heavy-duty creams there.
Consider a product with menthol. The cooling sensation that you get with menthol can help dim the feeling that you need to itch by confusing the nerves that are transmitting the itch signal.
Manage your stress. There’s likely an itch/stress cycle that begins when things get really bad—itch can trigger a lot of anxiety and stress, and it’s likely that that triggers more itch. Even on a more casual itch level, stress probably plays a role, too. 'Lots of patients ask me, "Did my stress cause this?"' says Dr. Kim. 'My answer is that I don’t think so, but it does aggravate it.'
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