Toenail fungus, also known as onychomycosis, is a progressive infection caused by fungi that thrive in warm, moist environments. It typically begins when microscopic organisms enter through small cracks in the nail or surrounding skin. In the early stage, the infection may appear as a small white or yellow spot under the nail surface. At this point, symptoms are mild and often overlooked, with little to no discomfort. This stage can last several weeks to a few months, depending on hygiene, footwear, and immune response. Early identification is important because treatment is more effective before the infection spreads deeper into the nail.
As the condition progresses into the moderate stage, visible changes become more noticeable. The nail may thicken, discolor, and develop a brittle or crumbly texture. Yellow-brown staining and slight lifting of the nail from the nail bed are common. Mild discomfort may develop, especially while wearing shoes. This stage can persist for several months and is often when patients begin seeking care. Without treatment, the fungus continues to spread, making the nail harder to manage and increasing the risk of complications.
In the advanced stage, toenail fungus can cause significant nail deformity and discomfort. The nail may become severely thickened and dark in color. In some cases, the nail may partially detach from the nail bed or emit an unpleasant odor. Pain may occur with walking or pressure, especially in tight footwear. This stage may take a year or longer to fully develop and often requires more aggressive treatment. The infection can also spread to other nails or surrounding skin if not properly addressed.
Risk factors play a major role in fungal progression. Individuals with diabetes, weakened immune systems, or poor circulation are more susceptible. Wearing tight-fitting shoes, excessive sweating, and walking barefoot in communal areas increase exposure. Older adults are at higher risk due to slower nail growth and reduced immunity. Proper foot hygiene and early care can slow or prevent progression. If you notice changes in your toenails, it is strongly suggested that you consult a podiatrist for effective treatment solutions, which may include prescribed medication.
If left untreated, toenail fungus may spread to other toenails, skin, or even fingernails. If you suspect you have toenail fungus it is important to seek treatment right away. For more information about treatment, contact Judson Siegel, DPM of Assabet Family Podiatry. Our doctor can provide the care you need to keep you pain-free and on your feet.
Symptoms
- Warped or oddly shaped nails
- Yellowish nails
- Loose/separated nail
- Buildup of bits and pieces of nail fragments under the nail
- Brittle, broken, thickened nail
Treatment
If self-care strategies and over-the-counter medications does not help your fungus, your podiatrist may give you a prescription drug instead. Even if you find relief from your toenail fungus symptoms, you may experience a repeat infection in the future.
Prevention
In order to prevent getting toenail fungus in the future, you should always make sure to wash your feet with soap and water. After washing, it is important to dry your feet thoroughly especially in between the toes. When trimming your toenails, be sure to trim straight across instead of in a rounded shape. It is crucial not to cover up discolored nails with nail polish because that will prevent your nail from being able to “breathe”.
In some cases, surgical procedure may be needed to remove the toenail fungus. Consult with your podiatrist about the best treatment options for your case of toenail fungus.
If you have any questions please contact our offices located in Marlborough and Plainville, MA . We offer the newest diagnostic and treatment technologies for all your foot and ankle needs.
