Most cysts on the face form when skin cells get trapped beneath the surface instead of shedding normally. These displaced cells create a small pocket, multiply inside it, and fill it with a thick protein called keratin. The specific cause depends on the type of cyst, but the most common culprits are clogged pores, skin injuries, hormonal shifts, and certain cosmetic products.
Epidermoid Cysts: The Most Common Type
The vast majority of facial cysts are epidermoid cysts, sometimes incorrectly called sebaceous cysts. Your skin constantly sheds its outermost cells, but sometimes those cells move deeper into the skin rather than falling away. Once trapped, they form a wall around themselves and begin secreting keratin, the same protein that makes up your hair and nails. Over time, this keratin accumulates into a firm, round lump just beneath the skin.
Epidermoid cysts typically feel firm but slightly compressible when you press on them. They move freely under the skin and grow slowly. Many have a small dark dot at the center, a tiny opening plugged with keratin. They’re painless unless they become inflamed, at which point the overlying skin turns red and tender. If one ruptures, it can leak a thick, yellowish, cheese-like substance, which is that built-up keratin.
Clogged Hair Follicles and Skin Injuries
Anything that disrupts the normal path skin cells take to reach the surface can trigger a cyst. A scratch, surgical wound, or even chronic sun damage can push epidermal cells into the deeper layer of skin (the dermis), creating a pocket where keratin collects. Acne itself can cause this kind of disruption, which is why people with a history of breakouts sometimes develop cysts in the same areas.
Irritation or blockage of a hair follicle is another common trigger. When the opening of a follicle gets plugged, the cells lining it can’t shed outward, so they accumulate inward instead. This is why cysts frequently appear on the face, neck, and upper body, areas dense with hair follicles and oil glands.
Hormonal Acne and Cystic Breakouts
Cystic acne is a different beast from epidermoid cysts, though both show up as painful lumps on the face. Cystic acne forms when hormonal changes cause your oil glands to overproduce sebum. That excess oil mixes with dead skin cells and bacteria inside a pore, creating a deep, inflamed pocket filled with fluid. These cysts sit further beneath the skin than typical pimples and don’t come to a head you can pop.
Androgens, a group of hormones that includes testosterone, are the primary driver. They ramp up oil production, which is why cystic acne commonly flares during puberty, around menstrual periods, during pregnancy, and in people undergoing testosterone therapy. Polycystic ovary syndrome (PCOS) is another well-known trigger because it raises androgen levels.
Milia: Tiny White Cysts
If your facial cysts are very small, white, and look like trapped grains of sand beneath the skin, they’re likely milia. These are miniature keratin-filled cysts, typically just one to two millimeters across. They’re often confused with whiteheads, but milia aren’t a form of acne and won’t respond to acne treatments.
Milia have several distinct causes depending on the type. Primary milia appear on the eyelids, forehead, and cheeks without any obvious trigger. Secondary milia develop after skin damage: burns, blisters, rashes, or excessive sun exposure. They can also form as a reaction to heavy skin creams or ointments that trap dead cells beneath the surface. Newborns frequently develop milia around the nose, which typically resolves on its own within a few weeks.
True Sebaceous Cysts
True sebaceous cysts are far less common than epidermoid cysts, though the two names are often used interchangeably. The difference is where they originate. While epidermoid cysts come from displaced skin cells, sebaceous cysts start inside the oil gland itself. They’re filled with sebum (the oily substance your skin naturally produces) rather than keratin. In practice, the two look nearly identical from the outside, and distinguishing them usually requires a biopsy.
Cosmetics and Skincare Products
Certain ingredients in makeup and skincare products are comedogenic, meaning they clog pores. When a pore stays blocked long enough, the buildup of oil, dead cells, and bacteria can develop into a cystic lesion. Some of the most problematic ingredients include coconut oil, wheat germ oil, cocoa and shea butters, isopropyl palmitate, and lanolin. These create a barrier on the skin that feels hydrating but traps debris underneath.
Dimethicone, a silicone found in many primers and moisturizers, can also seal in oil and sweat. Mineral oil (listed as petroleum, white oil, or paraffin oil on labels) does the same. Sodium lauryl sulfate, a foaming agent in many cleansers, doesn’t clog pores directly but disrupts the skin barrier and worsens inflammation, setting the stage for deeper breakouts. If you’re prone to facial cysts, switching to products labeled “non-comedogenic” can reduce the frequency of new ones.
Genetics and Inherited Conditions
Some people are simply more prone to cysts because of their genetics. If your parents developed facial cysts, you’re more likely to as well. In rare cases, multiple or recurring cysts can signal a genetic condition. Gardner syndrome, for example, is an inherited disorder that increases the risk of skin cysts along with growths in the bones and intestines. Juvenile milia is another inherited condition where cysts appear in childhood as part of a broader syndrome.
These genetic conditions are uncommon. For most people, a single cyst or an occasional recurrence is a normal skin event, not a sign of something systemic.
Why Facial Cysts Come Back
One frustrating feature of facial cysts is their tendency to recur. If you squeeze or drain one at home, the cyst wall remains intact beneath the skin. That wall continues producing keratin and refills over weeks or months. Complete removal requires excising the entire cyst wall, which is a minor procedure typically done under local anesthesia. Without removing that wall, recurrence rates are high.
Inflamed cysts deserve extra caution. When a cyst ruptures beneath the skin, keratin leaks into surrounding tissue and triggers an intense inflammatory response. The area becomes red, swollen, and painful, sometimes resembling an infection even when bacteria aren’t involved. Squeezing a cyst can force this rupture, which is why dermatologists consistently advise against it.