Under-the-skin pimples show up at exactly the moments when you want an even complexion: before an event, during a hectic period or right around your period. They feel like a painful, deep bump with no visible "head." You can't easily cover them with BB cream or CC cream either, and the temptation to squeeze them is strong.
Still, the way you handle the first few days makes the difference between an inflammation that fades without a trace and a dark spot or scar that sticks around for months. In this clear, practical guide you'll learn how to recognise under-the-skin pimples, what steps to follow to treat them properly and how to lower the risk of scarring. This information is for informational purposes only and does not replace a dermatological consultation.
What under-the-skin pimples are and how to recognise them
Under-the-skin pimples, also called acne nodules or "blind pimples," are inflammations located deep within the skin. The hair follicle becomes clogged with sebum and dead cells, and the inflammation develops beneath the surface, with no visible whitehead or blackhead.
They're easy to spot:
- you feel a firm area that hurts when touched;
- the skin turns red or pinkish;
- you see no pus on the surface;
- it lasts for several days.
They often appear on the chin and jawline, especially before your period. They can also show up on the forehead, cheeks or back. If you notice large, very painful nodules that keep coming back in the same spot or last longer than two weeks, book a dermatological consultation. Sometimes it may be cystic acne, which requires medical treatment.
If you'd like to better understand the differences between types of acne lesions, you'll find detailed information in this article on acne – types of acne, causes and treatment.
Why under-the-skin pimples appear
Under-the-skin pimples appear when the pore becomes blocked and inflammation develops deep down. In most cases, several factors are involved.
Hormonal imbalances play an important role. During the premenstrual phase, androgen levels rise and stimulate the sebaceous glands to produce more sebum. That's why many women notice painful pimples on the chin or jaw every month.
Stress affects the skin too. Cortisol, the stress hormone, can increase sebum production and inflammation. If you're going through a busy period and sleeping little, you may see these lesions more often.
Unsuitable products contribute to clogged pores. Very occlusive foundations, certain creams or heavy SPFs can encourage breakouts if they aren't suited to your skin type. Choose non-comedogenic formulas, especially if you use BB cream or CC cream daily.
A diet high in refined sugars and dairy can aggravate acne in some people. There's no universal rule, but if you notice a clear link between certain foods and breakouts, talk to your doctor or pharmacist.
What not to do if you have an under-the-skin pimple
Your first impulse is to press on it. Resist the temptation.
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Don't squeeze the pimple. Pressure pushes the inflammation deeper into the skin and increases the risk of atrophic scars (permanent indentations). On top of that, you can cause brown or red post-inflammatory marks that linger for months.
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Don't use improvised remedies. Garlic, toothpaste or rubbing alcohol can severely irritate the skin and cause chemical burns. An already active inflammation doesn't need extra aggression.
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Don't exfoliate the area aggressively. Harsh scrubs or abrasive brushes worsen the inflammation and can make the lesion spread.
If you've already picked at it and the area has become more inflamed, cleanse gently, apply a hydrocolloid patch and monitor how it develops. If you experience intense pain, widespread redness or heavy discharge, seek a doctor's advice.
How to treat an under-the-skin pimple properly – clear steps
1. Reduce the inflammation as soon as it appears
In the first 24–48 hours, apply ice wrapped in a clean towel for 5–10 minutes, twice a day. Cold reduces inflammation and can ease the pain.
Cleanse your face with a gentle, alcohol-free product. A cleanser with salicylic acid, such as Salicylic Acid Daily Gentle Cleanser, helps unclog pores and control excess sebum without over-drying the skin. For everyday use, massage gently and rinse with lukewarm water, not hot.
2. Apply the right active ingredients
Choose products with proven efficacy and introduce them into your routine gradually.
Salicylic acid (BHA) This beta hydroxy acid penetrates the pores and dissolves excess sebum. For consistent results, use it 2–3 times a week and adjust the frequency according to your skin's tolerance.
Benzoyl peroxide This ingredient reduces the bacterial population involved in acne and calms inflammation. Start with a low concentration (2.5%) and apply strictly as a spot treatment. It can dry out the skin, so keep an eye on how it reacts.
Niacinamide It soothes redness and regulates sebum production. You'll often find it in Korean products from brands such as Dr. Hedison, Medicube or Biodance. It's well tolerated by most skin types.
Retinoids (retinol) They stimulate cell turnover and prevent clogged pores. Apply in the evening and introduce gradually, 2–3 times a week. Avoid combining them directly with other exfoliants on the same evening, to reduce the risk of irritation. Women who are pregnant or breastfeeding should avoid retinoids and ask their doctor for advice.
3. Protect the area and let it heal
Hydrocolloid patches create a moist environment that supports healing and stops you from touching the lesion. Apply them to clean skin and leave them on for a few hours or overnight.
Hydration remains important. A lightweight, non-comedogenic cream keeps the skin barrier intact. Look for formulas with ceramides, collagen, peptides or PDRN (Polydeoxyribonucleotide). PDRN supports skin regeneration and can be found in advanced products from brands such as Medicube or Dr. Althea.
Don't skip moisturiser, even if you have combination or oily skin. Dehydrated skin can produce even more sebum.
How to prevent scarring after an under-the-skin pimple
Scars appear when inflammation affects the structure of the dermis and destroys collagen fibres. The longer and more intense the inflammation, the higher the risk.
There are three common types of marks:
- red marks (post-inflammatory erythema);
- brown marks (post-inflammatory hyperpigmentation);
- atrophic scars (indentations).
To lower the risk, follow a few clear principles.
Control the inflammation quickly Don't put off treatment. Apply anti-inflammatory ingredients and avoid touching the area.
Use ingredients that support regeneration Vitamin C stimulates collagen synthesis and helps even out skin tone. Apply it in the morning, on clean skin.
Azelaic acid reduces inflammation and hyperpigmentation. It's also suitable for sensitive skin.
Retinoids boost collagen production over time and improve skin texture. Use them consistently, taking breaks if irritation appears.
Products with peptides and collagen support skin firmness, while formulas with PDRN aid the skin repair process. In most cases, results appear gradually, over the course of a few months.
Apply sun protection daily UV rays make marks more pronounced and slow down healing. Choose a cream with SPF 30, for example Daily Sunscreen Spray Spf30, or SPF 50, such as SPF 50+ 60ml Fliptop. Apply your SPF cream every morning, even when it's cloudy. Reapply every 2–3 hours if you spend time outdoors.
Your daily routine to prevent under-the-skin pimples from coming back
Keep your routine simple and consistent. Don't crowd your bathroom with dozens of products.
In the morning:
- Cleanse your skin with a gentle gel or one containing salicylic acid.
- Apply a serum with niacinamide or vitamin C.
- Moisturise with a lightweight cream.
- Apply SPF.
In the evening:
- Remove your make-up with a double cleanse, especially if you use foundation or rich-textured Korean products every day.
- Apply a chemical exfoliant 2–3 times a week.
- Use retinol on alternate evenings.
- Finish with a repairing cream containing peptides or PDRN.
If make-up is part of your daily routine, it's worth paying attention to how you apply and remove it. Correct application can help maintain an even finish without unnecessarily weighing down blemish-prone skin. For simple, useful steps, take a look at the guide with 10 essential tips for applying BB cream correctly, especially if you want to keep your make-up light and better suited to acne-prone skin.
If you have frequent episodes of painful acne, talk to a dermatologist. Your doctor may recommend topical or systemic treatments, including antibiotics or hormonal therapies, depending on your case. Don't start such treatments without medical supervision.
When a dermatological consultation is necessary
Seek specialist help if:
- the nodules are large and very painful;
- the lesions last longer than two weeks;
- scars appear frequently;
- acne is affecting your confidence and quality of life.
A dermatologist can suggest personalised treatments or in-office procedures, such as intralesional corticosteroid injections for inflamed nodules. These interventions are performed only under medical supervision.
Keep an eye on your skin and go for regular check-ups if you're dealing with persistent acne. Prevention and early intervention reduce the risk of scarring.
Under-the-skin pimples call for patience and a well-chosen routine. Don't force the healing process. Choose ingredients suited to your skin type, protect your skin daily with SPF and seek medical help if the problem persists.
Discover the right products for your skin at SKINSEEN.ro and build a routine that supports your complexion in the long run.
Frequently asked questions
How long does an under-the-skin pimple last?
An under-the-skin pimple subsides within 7–14 days. The duration depends on how intense the inflammation is and how you treat it. If you take the right steps from the first few days and avoid squeezing, you reduce the risk of complications and scarring.
Can I apply retinol directly onto an under-the-skin pimple?
Yes, but with caution. Apply a small amount in the evening and monitor how your skin reacts. If the area becomes very irritated or painful, stop using it and ask a dermatologist for advice. Avoid retinol during pregnancy or breastfeeding without medical advice.
How do I tell an under-the-skin pimple from an acne cyst?
An under-the-skin pimple is usually smaller and clears up within a few days or weeks. An acne cyst is larger, deeper and more painful, and sometimes requires medical treatment. If the lesions are recurring or very inflamed, book a dermatological consultation.
