Warm water with Epsom salt is the most widely recommended soak for an infected toenail. Mix 1 to 2 tablespoons of unscented Epsom salt into one quart of warm water and soak for 10 to 20 minutes, three to four times a day until the toe improves. A vinegar-and-water soak is another effective option, especially if a fungal infection is involved. Both approaches help relieve pain, reduce swelling, and draw out pus from the infected area.
Epsom Salt: The Go-To Soak
Epsom salt (magnesium sulfate) dissolved in warm water is the standard home treatment recommended by most podiatrists and urgent care providers. The salt creates a mildly hypertonic solution, meaning it pulls fluid and pus out of swollen tissue through osmosis. This reduces pressure around the nail bed, which is often what causes the throbbing pain of an infected toe.
The ratio is simple: 1 to 2 tablespoons of unscented Epsom salt per quart of warm water. Use a small basin or bowl, just enough to submerge your toe or forefoot. The water should feel comfortably warm, roughly 100 to 105 degrees Fahrenheit. Hot enough to increase blood flow to the area, but not so hot that it burns or damages skin. If you don’t have a thermometer, test it with your wrist the way you would bathwater for a child.
Soak for 10 to 20 minutes per session, three to four times a day. That frequency matters more than any single long soak. Consistency over several days is what gives the infection a chance to drain and the surrounding tissue a chance to calm down.
Vinegar Soaks for Bacterial and Fungal Infections
A vinegar soak works differently from Epsom salt. The acetic acid in vinegar lowers the pH of the skin around your nail, creating an environment that’s hostile to both bacteria and fungi. This makes it a good choice when you’re not sure whether your infection is bacterial, fungal, or a bit of both.
Use a 1:1 ratio of white vinegar or apple cider vinegar to warm water. Soak three to four times a day. The vinegar helps decrease inflammation and can slow the growth of organisms that thrive at a neutral pH. Some people alternate between Epsom salt soaks and vinegar soaks throughout the day, though there’s no strict rule requiring you to choose one or the other.
Plain white vinegar works just as well as apple cider vinegar for this purpose. The active ingredient is the same: acetic acid. Apple cider vinegar has no additional antimicrobial advantage here despite its reputation.
Skip the Hydrogen Peroxide
Hydrogen peroxide is a common medicine cabinet staple, but it’s not a good choice for soaking an infected toenail. While the bubbling action does kill germs, it also destroys healthy tissue in the process. That damage can actually enlarge the wound and slow healing rather than speed it up. Physicians at the University of Utah Health put it bluntly: the whole process of sterilizing and killing everything off isn’t really necessary, and hydrogen peroxide may be doing more harm than good.
If you want to clean the area before or after a soak, lukewarm tap water run over the toe for five to ten minutes is sufficient. You don’t need a sterile, germ-free environment for the infection to heal. You just need a clean one.
What to Do After Each Soak
What you do after soaking matters almost as much as the soak itself. Pat the toe completely dry with a clean towel. Moisture left on the skin can lead to maceration, a condition where the skin softens, breaks down, and becomes more vulnerable to additional infection. This is especially important if you’re soaking multiple times a day.
Once dry, apply a thin layer of over-the-counter antibiotic ointment and cover the toe with a clean bandage or adhesive strip. If your infection stems from an ingrown toenail, the Mayo Clinic recommends tucking small, fresh bits of cotton or waxed dental floss under the ingrown edge after each soak. This gently lifts the nail away from the skin and encourages it to grow above the tissue rather than into it. Replace the cotton or floss after every soak.
Keep the toe in clean, dry socks and wear open-toed shoes or roomy footwear when possible. Tight shoes press on the nail and trap moisture, both of which work against healing.
Why Diabetics Should Be Cautious
If you have diabetes, frequent foot soaking carries extra risk. Prolonged moisture exposure causes maceration, the softening and breakdown of skin that makes wounds larger and more infection-prone. Research on diabetic foot ulcers found that maceration was a significant independent predictor of delayed wound healing, reducing the likelihood of recovery by roughly two-thirds compared to non-macerated wounds. Macerated skin is also weaker, more easily damaged by physical contact, and more susceptible to organisms that thrive in wet environments.
People with diabetes often have reduced sensation in their feet as well, which means water that’s too hot can cause burns they don’t feel. If you have diabetes and suspect a toenail infection, shorter soaks with thorough drying afterward are safer, and getting a professional evaluation early is worth the effort.
Signs the Infection Needs Medical Attention
Home soaks work well for mild infections, the kind where you see a little redness and swelling right around the nail with some tenderness. But certain signs mean the infection is spreading beyond what soaking can handle. Watch for red streaks extending away from the toe, warmth and redness that keeps expanding rather than shrinking, fever, chills, or skin that turns black or develops blisters. Numbness or tingling in the foot is another red flag.
These are signs of cellulitis, a bacterial skin infection that can move fast and requires prescription antibiotics. If the redness and swelling haven’t started improving after two to three days of consistent soaking, or if symptoms are getting noticeably worse within hours rather than days, the infection has likely outpaced what a home soak can manage.