Cysts are sacs that can develop in the skin, organs, or other tissues. They often contain fluid, air, or various other substances. Most cysts are benign and do not indicate cancer, though monitoring is sometimes advised. Here are a few factors to look at when exploring the common types of cysts and their causes:
Epidermoid Cysts
Epidermoid cysts are slow-growing bumps that develop under the skin and often appear on the face, head, neck, back, or genitals. They are usually small and round, with a thick, yellow material inside that often has a noticeable odor. These sacs typically grow gradually and may go unnoticed for months or years.
Epidermoid sacs are sometimes incorrectly called sebaceous cysts, but true sebaceous cysts are much less common and arise from sebaceous glands rather than the epidermis. Understanding this distinction helps clarify their origin and characteristics. While usually harmless, epidermoid cysts can occasionally become inflamed or irritated, leading to discomfort or swelling.
Ganglion Cysts
Ganglia sac often develop near joints or tendons. They are commonly found on the hands, wrists, feet, or ankles, and their size can change over time. These sacs are filled with a jellylike fluid, which sometimes causes mild discomfort or interferes with joint movement. In some cases, they may disappear on their own without any intervention.
Pilar Cysts
Pilar sacs are bumps that develop from hair follicles and are most commonly found on the scalp. They are filled with keratin, a protein present in the skin, which gives them a firm texture. These cysts often run in families, suggesting a hereditary component. Their size can vary, and they typically grow slowly over time.
Pilonidal Cysts
A pilonidal sac develops near the tailbone and can sometimes become infected, causing discomfort. These sacs are typically filled with skin debris and hair, and they occur more often in men. Sitting for long periods may increase the likelihood of developing a health condition. They usually appear between puberty and around age 40.
Baker’s Cysts
A Baker’s sac is a fluid-filled sac that forms behind the knee, creating a noticeable bulge and a sense of tightness. These cysts often develop in response to underlying knee joint issues, such as arthritis, or from injuries to the cartilage. Their size and discomfort may vary depending on the severity of the joint condition.
Chalazia Cysts
A chalazion is a small lump that forms on the eyelid when an oil gland becomes blocked, causing fluid to accumulate. It can appear on either the upper or lower eyelid. The lump may feel firm, tender, or slightly swollen and sometimes causes mild irritation.
In some cases, a chalazion grows large enough to affect vision. Blurry vision may develop if it is applied to the eye. Swelling and discomfort often accompany the lump, and while many chalazia gradually resolve on their own, monitoring changes and consulting a healthcare professional can help manage symptoms effectively.
Finding the Right Specialist
Many types of cysts exist, and their causes can differ widely. A medical professional can provide an accurate diagnosis while explaining the characteristics of each cyst. They may suggest approaches for management or monitoring depending on the situation. Scheduling a consultation offers an opportunity to discuss evaluation and care options.
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