No, the sun doesn't directly cause acne, but it significantly worsens existing acne and can contribute to its development. While sun exposure might initially seem to dry out oily skin, this drying effect triggers an overproduction of sebum (oil) by the sebaceous glands. This excess sebum is a primary factor in the formation of acne blemishes. [1, 7, 8] Furthermore, sun exposure can lead to post-inflammatory hyperpigmentation and erythema, darkening acne lesions and making them more noticeable. [2] The sun also contributes to a specific type of acne known as Acne Aestivalis (Mallorcan acne), triggered by UVA rays. [4] Therefore, sun protection is crucial for managing and preventing acne. [5, 6]
How Sun Exposure Aggravates Acne:
- Sebum Overproduction: Sun-induced dryness stimulates increased sebum production, clogging pores and leading to breakouts. [1]
- Darkening of Acne Lesions: UV rays darken existing acne and can prolong their duration. [6]
- Acne Aestivalis: UVA rays can trigger a specific type of acne. [4]
- Skin Thickening: Sun exposure thickens the skin, contributing to acne problems. [7]
Important Note: Solar Comedones vs. Acne
It's important to distinguish between solar comedones and acne. Although both involve clogged pores, solar comedones are specifically caused by prolonged sun exposure and differ from typical acne. [9]
References:
[1] Acne and sun: the negative effects of UV rays. (Source provided in prompt)
[2] Sun exposure, a relevant exposome factor in acne patients and how ... (Source provided in prompt)
[4] Sun and acne-prone skin| Acne | Eucerin (Source provided in prompt)
[5] Sun and acne-prone skin| Acne | Eucerin (Source provided in prompt)
[6] Back acne: How to see clearer skin (Source provided in prompt)
[7] How sun exposure affects acne | Uniprix - Uniprix (Source provided in prompt)
[8] Is your workout causing your acne? (Source provided in prompt)
[9] Solar Comedones: Symptoms, Causes, Risks, and Treatment (Source provided in prompt)
