A hurting toenail is most often caused by one of four things: an ingrown nail, a fungal infection, trauma (a stubbed or bruised toe), or an infection in the skin around the nail. The type of pain, where exactly you feel it, and what the toe looks like can help you narrow down what’s going on and whether you can manage it at home.
Ingrown Toenails: The Most Common Cause
If the pain is along the side of your toenail, especially the big toe, an ingrown nail is the most likely culprit. This happens when the edge of the nail curves and grows into the surrounding skin. Early on, the area feels hard, swollen, and tender to light touch. You might notice the skin starting to grow over the nail edge, with redness or darkening around the affected side.
Left alone, an ingrown nail can become infected. Signs of infection include pus draining from the area, increased swelling, warmth or heat in the toe, and pain that gets noticeably worse. At that point, home care alone may not be enough. In severe cases, a doctor can remove part of the nail in a procedure called a partial nail avulsion, which typically heals in six to eight weeks.
For a mild ingrown nail, soaking your foot in warm water with 1 to 2 tablespoons of unscented Epsom salt per quart of water for 15 minutes can help reduce swelling and tenderness. Do this several times a day for the first few days. After soaking, gently dry the toe and avoid tight shoes that press on the nail. Don’t try to dig the nail out yourself, as this often makes things worse.
Fungal Nail Infections
Fungal infections usually don’t hurt at first. They start as a white or yellow-brown spot under the tip of the nail. Over time, the nail thickens, becomes discolored, and starts to crumble or look ragged at the edges. Pain develops later, once the nail has thickened enough to press against your shoe or separate from the nail bed underneath. A foul smell is another telltale sign.
These infections are stubborn. Topical antifungal solutions applied daily for 48 weeks (nearly a full year) have clinical cure rates of only 6% to 18%, depending on the product. Oral antifungal medication taken for 12 weeks is far more effective, with cure rates between 38% and 76%. If your nail has been thickening and changing color for weeks or months, an over-the-counter cream is unlikely to resolve it on its own.
Trauma and Bruised Nails
If you recently stubbed your toe, dropped something on it, or have been running or hiking in shoes that are too tight, the pain may come from a bruise beneath the nail. Blood pools between the nail and the nail bed, creating a dark red, purple, or black discoloration. Small bruises can be sore for a few days and resolve on their own as the nail grows out.
Larger bruises that cover more than half the nail surface, or more than a quarter of the nail if you also suspect a fracture, typically need to be drained by a doctor. The procedure is quick and provides almost immediate pain relief by releasing the pressure trapped under the nail. If the pain is intense and throbbing and you can see a large dark area under the nail, that’s your signal to get it looked at rather than waiting it out.
Infection Around the Nail (Paronychia)
Sometimes the pain isn’t in the nail itself but in the skin fold right next to it or at the base. This is paronychia, an infection of the tissue surrounding the nail. Bacterial paronychia comes on fast, usually two to five days after some kind of minor injury like a hangnail tear, an aggressive manicure, or nail biting. The skin next to the nail becomes red, swollen, and very tender. You may see pus collecting under the skin fold when you press on it.
Chronic paronychia develops more slowly, lasting six weeks or longer, and often involves a mix of bacterial and fungal organisms. The cuticle pulls back, the nail fold stays puffy and tender, and the nail itself may develop ridges, thicken, or change color over time. This form is more common in people whose hands or feet are frequently wet.
How Your Shoes May Be Causing It
Repetitive, low-grade pressure from poorly fitting shoes is behind many cases of toenail pain, even when there’s no single injury you can point to. Two shoe features cause the most damage: a narrow toe box and a raised heel. A narrow toe box compresses the toes together, putting extra pressure on the sides of the nails, particularly the big toe and the smallest toe. This is one of the most common triggers for ingrown nails.
Elevated heels shift your body weight forward onto the ball of the foot, limiting how much the big toe joint can move. That forces the nail to absorb more pressure with every step. Over time, this microtrauma can cause the nail to partially separate from the nail bed. Once that happens, normal nail growth gets disrupted, the nail becomes unstable, and the cycle of pressure and damage repeats itself. Switching to shoes with a wide toe box and minimal heel rise can break that cycle and let the nail recover.
What Different Symptoms Point To
Matching your symptoms to the right cause helps you decide what to do next:
- Pain along the nail edge with redness and swelling: ingrown toenail.
- Thickened, discolored, crumbly nail with gradual onset of pain: fungal infection.
- Dark discoloration under the nail after an injury, with throbbing pain: subungual hematoma (bruise under the nail).
- Rapid-onset redness, swelling, and pus at the skin fold next to the nail: acute paronychia.
- Chronic puffiness at the nail base with ridged or discolored nail growth: chronic paronychia.
Toenail Pain With Diabetes
If you have diabetes, toenail pain deserves extra attention. Reduced blood flow and nerve damage in the feet can turn a minor nail problem into a serious infection quickly. The CDC recommends seeing a doctor if you notice tingling, burning, or pain in your feet, changes in foot color or temperature, thick or yellow toenails, loss of feeling, dry cracked skin, or any sign of an ingrown nail or fungal infection. What would be a minor nuisance for most people can lead to ulcers or more serious complications when circulation is compromised.
What Recovery Looks Like
For a mild ingrown nail treated at home with soaking and roomier shoes, you can expect improvement within a week or two. If a partial nail removal is needed, plan to rest with your foot elevated on the day of the procedure. The wound is redressed every other day, with a warm salt water soak before applying a fresh dressing, until it heals in roughly six to eight weeks.
Fungal infections are the slowest to resolve. Even with the most effective oral medication, treatment runs 12 weeks, and the nail itself takes months to grow out and look normal again. Topical treatments require close to a year of daily application. Nail trauma that doesn’t need drainage will resolve as the nail grows out, which takes about six to nine months for a big toenail to fully replace itself.