Is nail fungus safe in people with diabetes?

A fungal nail can become thick, brittle, discoloured, or difficult to trim. A thick nail may rub against footwear and create a cut or pressure point. Diabetes can also reduce sensation, so a person may not notice a small wound promptly. Reduced circulation or slower healing can make foot problems harder to resolve. The nail change may have another cause, so examination helps confirm whether fungus is present.

Arrange a medical assessment rather than cutting deeply under the nail or using an aggressive home remedy. Keep feet clean and dry, change socks when damp, and choose shoes with room around the toes. Check the feet and between the toes regularly for cracks, blisters, redness, drainage, or swelling. Do not share nail tools, and have a clinician or trained foot-care professional manage difficult trimming if sensation or circulation is reduced. Treatment may involve a medicine applied to the nail or a prescribed oral medicine, depending on the nail, other medicines, and general health. Read more about [Nail Fungus](/conditions/nail-fungus/).

Contact a clinician promptly for spreading redness, warmth, swelling, drainage, increasing pain, a new open area, a darkening toe, fever, or a wound that is not improving. Seek urgent medical help if the foot becomes suddenly cold, pale, blue, severely painful, or numb, or if you feel acutely unwell. These warning signs need assessment regardless of how mild the nail change first appeared.

Ask whether the nail change has been confirmed as fungus, whether circulation and sensation need checking, which treatment suits your diabetes medicines and kidney or liver health, and how often your feet should be inspected during treatment.