Nodules are small, raised areas or lumps that can form on the skin due to infections, inflammation, or other causes. In microbiology, they are often associated with certain bacterial and fungal infections.
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Nodules can be a symptom of bacterial infections such as Mycobacterium leprae which causes leprosy.
Fungal infections like Sporotrichosis may also present as nodules on the skin.
They are typically firm to touch and can be painful or painless depending on the underlying cause.
Diagnosis of nodules may involve microbial cultures, biopsy, or imaging studies to determine the causative agent.
Treatment varies widely depending on whether the nodules are caused by bacteria, fungi, or other factors.
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Related terms
Papule: A small raised bump on the skin that is less than one centimeter in diameter.