Acne is a common skin disease that causes pimples. Understanding acne causes and treatment starts with a basic fact: pimples form when hair follicles under the skin become clogged. Acne is especially common in teenagers and young adults, but anyone can get it. This guide is useful for people with acne and for parents or caregivers seeking a straightforward overview.
According to MedlinePlus, the National Library of Medicine’s acne overview, acne is not serious, but it can cause scars. Knowing what the source supports—and what remains uncertain—can help separate basic skin-care guidance from common myths.

Acne causes and treatment: What is known?
Most pimples develop on the face, neck, back, chest, and shoulders. Although clogged hair follicles explain how pimples form, no one knows exactly what causes acne. Hormone changes, including those that occur during the teenage years and pregnancy, probably play a role.
Treatment options include medicines and creams. The MedlinePlus overview introduces these broad categories but does not provide a specific medicine, dose, or treatment schedule. Its general information is a starting point for understanding acne, not a personalized treatment plan.
Common myths about acne
Does dirty skin cause pimples?
No. Blackheads and pimples are not caused by dirt. The fact that acne involves clogged follicles does not mean someone has failed to keep their skin clean. MedlinePlus recommends cleaning the skin gently rather than treating acne as a cleanliness problem.
Are chocolate and greasy foods to blame?
Chocolate and greasy foods are often blamed for acne. However, MedlinePlus states that there is little evidence that foods have much effect on acne in most people. This distinction matters: a commonly repeated explanation is not necessarily an established cause.
Does stress cause acne?
Stress does not cause acne, according to the overview, but it can make acne worse. Those are different claims. Stress may affect existing acne without being the reason acne developed in the first place.
Basic skin-care guidance
MedlinePlus gives three practical recommendations for people who have acne: clean the skin gently, try not to touch the skin, and avoid the sun. These are general measures, not a complete treatment program or a promise that acne will clear.
Gentle cleansing is consistent with the fact that acne is not caused by dirt. The overview does not specify a cleansing frequency or detailed product routine. It also does not give a step-by-step sun-protection plan. Keeping the guidance at that level avoids turning a brief educational summary into instructions the source does not provide.
When to seek professional advice
Contact a health care provider if you have questions about your health, including questions about acne or treatment choices. Because acne can cause scars, concerns about scarring are also something to discuss. MedlinePlus includes a dermatologist-finding resource for readers seeking a skin specialist.
The page also points to information about acne treatments during pregnancy. If you are pregnant and have treatment questions, use professional medical advice rather than treating this general overview as a guide to choosing a product. MedlinePlus states that its information should not replace professional medical care or advice.
Frequently Asked Questions
Can adults get acne?
Yes. Anyone can get acne, although it is common in teenagers and young adults.
Where does acne usually appear?
Most pimples form on the face, neck, back, chest, and shoulders.
What treatments are available for acne?
Treatments include medicines and creams. A health care provider can address questions about treatment choices; the MedlinePlus overview does not specify an individual regimen.
