Sporotrichosis is a fungal infection that causes red, tender nodules on the fingers, wrists, and arms. The lymph nodes may also become infected.
A person may get sporotrichosis when exposed to soil, or when a thorn or splinter punctures the skin. The infection is caused by a fungus in the soil. Sometimes, breathing in the fungus can create an infection throughout the body.
Usually, infection from the fungus causing sporotrichosis comes about through a skin puncture with a contaminated thorn or sticker. Gardeners, farmers, and others working in brush, with rose bushes, barberry bushes, or certain types of moss are more at risk for this infection.