A skin nodule is a raised bump on the skin that is solid or cystic, measuring greater than 1 centimeter (cm) but less than 2 cm in diameter. They are palpable, meaning you can feel them, and are often firm. Nodules can develop just below the skin's surface or deeper within the skin tissues.
Characteristics of Skin Nodules
- Size: Larger than 1 cm, but smaller than 2 cm in diameter.
- Shape: Usually round or oval.
- Texture: Solid or cystic (fluid-filled).
- Depth: Can be located just below the surface or deeper in the skin.
Causes of Skin Nodules
Skin nodules can arise from a wide variety of conditions, including:
- Acne: Nodular acne is a type of inflammatory acne that creates firm, painful lumps beneath the skin's surface.
- Cysts: These are fluid-filled sacs that can develop under the skin. Examples include sebaceous cysts (filled with a cheese-like protein) and dermoid cysts.
- Lipomas: These are benign (non-cancerous) fatty tumors.
- Skin Cancers: While less common, nodules can indicate skin cancers like basal cell carcinoma.
- Other Conditions: Warts, xanthelasma/xanthoma, and other skin lesions can present as nodules.
Location and Appearance
Nodules can appear anywhere on the body, though they are often found on the back and head. Their appearance varies greatly depending on the underlying cause, ranging from flesh-colored to red or inflamed.
Note: The information provided here is for general understanding and should not be considered medical advice. If you have a skin nodule, consult a dermatologist for proper diagnosis and treatment.
