What is the white substance that comes out when you squeeze acne on your face?

The white substance that emerges when squeezing acne on the face is typically a sebaceous plug. Such plugs form when sebaceous glands overproduce sebum, yet the sebum fails to drain normally from the pores. Consequently, the accumulated sebum solidifies beneath the skin, forming a plug—this solidified material, when expressed, appears as a white sebaceous plug.

Common causes of this condition include dietary factors—such as excessive consumption of greasy or spicy foods. Generally, these sebaceous plugs are harmless to overall health. When small acne lesions appear and can be manually expressed to yield white plugs, it is advisable to avoid using additional cosmetics and instead maintain thorough facial hygiene. If other symptoms develop, patients should promptly consult a dermatologist at an accredited hospital for proper evaluation and appropriate pharmacologic treatment.

Importantly, self-extraction of lesions must be avoided, as it significantly increases the risk of infection. Daily hydration and increased vegetable intake are also recommended. For individuals with closed comedones (whiteheads), gentle cleansing with warm water and mild soap—or sulfur-based soap—can help maintain facial cleanliness. Topical keratolytic agents—including tretinoin cream, calculus bovis-based preparations, or salicylic acid formulations—may be applied regularly. Additionally, medical aesthetic treatments such as glycolic acid or salicylic acid chemical peels may be considered to effectively manage and resolve whitehead comedones.