Teenage acne: how to help your child understand and care for their skin
by LauraShare
When your child starts getting acne, you also start wondering how to help. You see them rubbing their face, trying new products every week or avoiding the mirror, and you don't always know what to say.
The first step is understanding what's happening in their skin. Acne doesn't appear "for no reason" or because of poor hygiene: it's a chronic inflammatory condition of the pilosebaceous unit, the structure made up of the pore, the hair and the sebaceous gland (Bagatin et al., 2019). Helping them isn't about chasing perfect skin, but about teaching them to care for it.
Why does acne appear in adolescence?
Adolescence is a stage of major hormonal change, and the sebaceous gland responds to it. This gland has androgen receptors: when these hormones bind to them, they stimulate sebum production and can encourage changes in the cells lining the pore's duct (Bagatin et al., 2019).
From there, a chain is set in motion:
| Step | What happens |
|---|---|
| 1. Hormonal changes | Androgens stimulate the sebaceous gland |
| 2. More sebum | The gland produces more lipids and the composition of sebum changes |
| 3. Blocked pores | The cells in the duct build up and form a microscopic plug, the microcomedone |
| 4. Bacteria and inflammation | Inside the blocked pore, C. acnes changes its activity and the skin responds with inflammation |
| 5. Breakout | The spot becomes visible on the surface |
The key to understanding your child: by the time they see a spot, the process has been under way for days or weeks (Vasam et al., 2023). That's why spots seem to come "out of nowhere", and why no product makes them disappear overnight.
It isn't about hygiene
It's one of the ideas that does the most harm to a teenager with acne, and it isn't true.
- Blackheads aren't dirt. When the pore's canal opens and its contents come into contact with the air, they oxidise. Their dark colour is linked to the oxidation of lipids and melanin, not to grime.
- The bacterium lives on all skin. Cutibacterium acnes is part of the normal microbiota of sebum-rich areas and is present on skin with and without acne. What changes is its activity inside a blocked pore (Dessinioti and Katsambas, 2024).
- Inflammation starts on the inside. It begins while the microcomedone is forming, before there's anything red on the surface (Dreno et al., 2015).
| Lesion | What happens | What it means |
|---|---|---|
| Closed comedone | The contents build up under a narrow opening | Pore blockage predominates |
| Open comedone (blackhead) | The canal opens and the material oxidises | The dark colour doesn't come from dirt |
| Papule or pustule | The superficial inflammatory response increases | It may respond to antimicrobial and anti-inflammatory strategies |
| Nodule | The inflammation reaches the deep dermis | Pain and the risk of scarring increase |
The same person can have a closed comedone, a papule and a nodule at the same time. This explains why a single intervention rarely covers the whole process.
Acne doesn't only appear on the face
Here's something many families don't know: acne can also appear on the back, chest, shoulders and neck.
Acne on the body has a practical particularity: it's examined less, treated less and often taken less seriously than facial acne, even though its biology is the same (Woo and Kim, 2022). Because it's covered by clothes, your child may not mention it, so it's worth asking them or noticing whether they also have lesions in these areas.
How to help: four habits that make a difference
When a breakout appears, the usual reaction is to wash more times a day, use a cleanser that leaves the skin tight, add an exfoliant and try a new product every week. That routine damages the skin barrier and often ends with the treatment being abandoned, while inside the pore the blockage keeps forming in exactly the same way (Jordan and Baldwin, 2016).
| Habit | Why it matters |
|---|---|
| Cleanse gently | Oil is made by the gland and water is held by the outermost layer of the skin. Harsh cleansing leaves the skin tight, but the gland keeps producing just the same (Jordan and Baldwin, 2016) |
| Don't pick at spots | Picking at a lesion or keeping it active for a long time can prolong the red marks it leaves behind (Kalantari et al., 2022) |
| Be consistent | While one spot fades, other pores may be forming microcomedones that can't be seen yet. Treatments need several weeks to act on them (Reynolds et al., 2024) |
| Use suitable treatments, with professional guidance | Each treatment acts on one part of the process. Topical retinoids, for example, act on the formation of new microcomedones (Reynolds et al., 2024) |
Skin needs consistency more than intensity. Passing this idea on to your child spares them frustration and helps them not to give up after a few weeks.
Exams, sleep and diet
Acne doesn't depend on the skin alone. Some everyday factors can keep the process active:
- Stress. During exam periods, a correlation has been observed between more stress and more severe acne (Chiu et al., 2003). If you notice breakouts coinciding with exam season, it isn't a coincidence.
- Sleep. Not getting enough sleep disrupts the cortisol rhythm and the skin barrier's night-time repair.
- Diet. The evidence points to an association between high glycaemic load diets and milk, especially skimmed milk, and more severe acne. But it comes mainly from observational studies and doesn't support cutting out foods automatically (Meixiong et al., 2022).
A useful way to look at it is to note down breakouts for several weeks alongside exams, sleep and any changes in diet or products. If breakouts keep following the same change, a specific adjustment can be tried while keeping everything else stable. Broad dietary restrictions, especially at a stage of growth, should be considered carefully and with a professional.
LED technology as part of their care
Technology can also be part of that care, always as a complement and not as a substitute for a suitable routine.
Blue light acts on the bacterium; it doesn't attack the skin. C. acnes produces porphyrins, molecules that absorb blue light. When they receive that energy, they generate reactive species capable of altering the bacterium (Diogo et al., 2021). Red and infrared light, for their part, act on signals related to inflammation and tissue recovery around the pore (Hernández-Bule et al., 2024).
For a teenager, LED technology also has a practical advantage: it doesn't cause the thermal injury of some lasers, it only acts on the treated area and it can be repeated regularly at home. It fits well with the consistency that acne needs.
The Silicone LED Mask, for the face, and the Silicone LED Neck, for the neck and décolletage, combine blue light at 465 to 470 nm, red light at 630 to 635 nm and near and deep infrared, with more than 200 diodes across both modules, five power levels and sessions of 10 to 30 minutes.
- Blue light for the bacterial component of active breakouts.
- Red and infrared light for inflammation and tissue recovery.
- Face and body too: the Silicone LED Neck can be placed on the back, an area that's hard to reach and where lesions also form.
- For use at home, recommended from age 16.
Results start to show from day 28, always within the recommended protocol. The Silicone LED Mask and the Silicone LED Neck complement the usual skincare routine and cosmetic and medical aesthetic treatments.
Explore the Silicone LED Mask →
Explore the Silicone LED Neck →
When to see a dermatologist
- Nodular lesions that are deep or painful.
- Breakouts that leave scars.
- Acne that doesn't respond to treatment after several weeks.
It's not a good idea to wait for them to "grow out of it" if the acne is leaving marks: the window to prevent a scar lies in the active phase, so the sooner, the better.
This content is for informational purposes only and doesn't replace a medical assessment.
Frequently asked questions
Are blackheads dirt? No. They're blocked pores whose canal has opened. The dark colour is due to the oxidation of lipids and melanin on contact with the air.
Should they wash their face more often if they have more spots? No. Cleansing more often or with harsh products leaves the skin tight without reducing sebum production, and can lead them to abandon treatment because of irritation.
Why does another spot appear just as the last one fades? Because pores in the same area aren't at the same stage. While one resolves, others contain microcomedones that can't be seen yet.
Do they need to give up dairy or sugar? The evidence shows an association with milk and high glycaemic load diets, but it doesn't support cutting out foods automatically. If you suspect a link, observe over several weeks and talk to a professional.
From what age can they use an LED mask? SKINVITY's Silicone LED Mask and Silicone LED Neck are recommended from age 16, always following the recommended protocol.
In summary
Teenage acne doesn't appear "for no reason" or because of poor hygiene. Hormonal changes stimulate the sebaceous gland, the pore becomes blocked, C. acnes changes its activity and inflammation leads to a breakout, sometimes on the back, chest or shoulders too. Helping your child means teaching them to cleanse gently, not to pick, to be consistent and to rely on suitable treatments with professional guidance. You give them the tools. They learn to care for their skin.
If you'd like to go deeper, read Why do spots appear? The three stages of acne and where LED light works and LED light and acne: 8 myths worth debunking, or download SKINVITY's Adult Acne Guide →
The SKINVITY Team
Scientific references
The following references correspond to the general scientific evidence on acne and photobiomodulation cited in this article, not to an efficacy test specific to a SKINVITY device.
- Bagatin E, Freitas THP, Rivitti-Machado MC, et al. Adult female acne: a guide to clinical practice. An Bras Dermatol. 2019;94(1):62-75.
- Vasam M, Korutla S, Bohara RA. Acne vulgaris: a review of the pathophysiology, treatment, and recent nanotechnology based advances. Biochem Biophys Rep. 2023;36:101578.
- Dessinioti C, Katsambas A. The microbiome and acne: perspectives for treatment. Dermatol Ther (Heidelb). 2024;14(1):31-44.
- Dreno B, Gollnick HPM, Kang S, et al. Understanding innate immunity and inflammation in acne: implications for management. J Eur Acad Dermatol Venereol. 2015;29 Suppl 4:3-11.
- Woo YR, Kim HS. Truncal acne: an overview. J Clin Med. 2022;11(13):3660.
- Jordan L, Baldwin HE. Stratum corneum abnormalities and disease-affected skin: strategies for successful outcomes in inflammatory acne. J Drugs Dermatol. 2016;15(10):1170-1173.
- Kalantari Y, Dadkhahfar S, Etesami I. Post-acne erythema treatment: a systematic review of the literature. J Cosmet Dermatol. 2022;21(4):1379-1392.
- Reynolds RV, Yeung H, Cheng CE, et al. Guidelines of care for the management of acne vulgaris. J Am Acad Dermatol. 2024;90(5):1006.e1-1006.e30.
- Chiu A, Chon SY, Kimball AB. The response of skin disease to stress: changes in the severity of acne vulgaris as affected by examination stress. Arch Dermatol. 2003;139(7):897-900.
- Meixiong J, Ricco C, Vasavda C, Ho BK. Diet and acne: a systematic review. JAAD Int. 2022;7:95-112.
- Diogo MLG, Jorge MFS, Campanha NH. Effect of blue light on acne vulgaris: a systematic review. Sensors (Basel). 2021;21(20):6943.
- Hernández-Bule ML, Trillo MÁ, Martínez-García MA, Abreu-Muñoz P. Unlocking the power of light on the skin: a comprehensive review on photobiomodulation. Int J Mol Sci. 2024;25(8):4483.