Discovering a lump on your neck, back, or behind an ear can be alarming — but in most cases, it is not a cause for serious concern. Epidermoid cysts, one of the most common culprits, are typically benign and slow-growing. Knowing the difference between a lump that can be monitored at home and one that requires medical attention can save both worry and time.
What is an epidermoid cyst and why does it form?
An epidermoid cyst develops when skin cells fail to shed properly and instead accumulate beneath the surface. Over time, they form a small, slow-growing bump filled with keratin — a protein naturally present in skin, hair, and nails.
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