September 25, 2026
Severe acne: when to see a dermatologist
How doctors define severe acne, the signs that mean a store routine is not enough, what a dermatologist can prescribe, and how to prepare for the visit.
By Nick, Founder of Skinli. Not a doctor. General education only.
Part of the Acne treatment, which puts every step in order.
Most acne can be treated with products from a store. Severe acne is the exception. The American Academy of Dermatology (AAD) says you cannot clear it with acne treatment bought at the store, and that waiting it out can take years. This guide explains how doctors define severe acne, the signs that mean it is time to see a dermatologist, what treatment looks like, and how to prepare. It is part of the guide on how to get rid of acne.
How doctors define severe acne
NICE, the body that writes clinical guidance for England, sorts acne into two groups by counting spots:
| Group | What it includes |
|---|---|
| Mild to moderate | Any number of blackheads and whiteheads, up to 34 inflamed spots, and up to 2 nodules |
| Moderate to severe | 35 or more inflamed spots, or 3 or more nodules |
Inflamed spots are red pimples and pus-filled spots. Nodules are large, painful, solid lumps deep in the skin. NIAMS, part of the US National Institutes of Health, says severe nodular acne is sometimes called cystic acne.
The AAD describes severe acne in plain terms. People with severe acne tend to have many breakouts, which can cover the face, chest and back, and can also appear along the jawline, neck and buttocks. The breakouts often go deep into the skin and hurt.
Signs it is time to see a dermatologist
You do not need severe acne to see a dermatologist. The AAD says many people with acne can benefit from one. These signs, from the AAD, NICE and the NHS, point to a visit:
- Deep, painful lumps. The AAD says cysts and nodules can leave scars when they clear. NICE says doctors should refer people with nodulo-cystic acne to a specialist.
- Scars or dark marks. NICE advises considering referral for acne that is leading to scarring or causing color changes that stay.
- No response to treatment. NICE advises considering referral for mild to moderate acne that has not responded to two completed 12-week courses of treatment. The AAD says to see a dermatologist when acne has not cleared with treatment you can buy without a prescription.
- Acne that affects your mood. NICE says acne of any severity can cause psychological distress and mental health disorders, and advises considering referral when it does. The NHS lists acne that is affecting your mental health as a reason to see a GP.
- Breakouts after a new medicine. The AAD's quiz lists breakouts that began after starting a medication within the last 6 months.
- Unusual places. The AAD also lists pimple-like bumps in the armpit, groin or thighs, which may be a different condition.
The AAD's self-check has eleven questions and says to see a dermatologist if six or more apply. Dermatologist Julie Harper, MD, quoted by the AAD, adds that it is never the wrong time to see a dermatologist for adult acne.
Go the same day
NICE says acne fulminans, which the AAD calls a serious type of severe acne, needs urgent referral to a hospital dermatology team on the same day. NICE also advises considering referral to mental health services for anyone with acne who has thoughts of suicide or self-harm, or a severe depressive or anxiety disorder. If you have thoughts of harming yourself, contact emergency services or a crisis line now.
What a dermatologist can do
The AAD lists these treatments for severe acne:
| Treatment | What the AAD says |
|---|---|
| Antibiotic pill plus a medicine on the skin | Often the first treatment for severe acne. The pill reduces redness and swelling. The skin medicine works on bacteria and clogged pores |
| Isotretinoin | A strong pill that works on all four causes of acne. 85 percent of patients see permanent clearing after one course |
| Birth control pill (for women) | Can be part of a plan, often with an antibiotic or spironolactone |
| Spironolactone (for women) | Reduces excess oil. Can treat severe acne in women |
| Corticosteroid injection | Quickly reduces the size and pain of a single cyst or nodule. Flattens most within 48 to 72 hours |
| Incision and drainage | Drains a large, painful cyst that medicine cannot clear. Never do this at home |
The 2024 AAD guideline strongly recommends isotretinoin for acne that is severe, causing scars or distress, or not responding to standard treatment. It also calls for limiting antibiotic pills and always pairing them with treatment on the skin. NICE says an antibiotic should never be used alone for acne, and that a treatment with an antibiotic should continue beyond 6 months only in exceptional circumstances.
About isotretinoin
The AAD says one course takes four to five months. Because of possible side effects, US patients must enroll in the FDA's iPLEDGE program, and the AAD says you see your dermatologist every 30 days for a new prescription. MedlinePlus says pregnant women should not take isotretinoin, because it causes severe birth defects, and that you will have regular blood tests. The AAD warns that buying it from a website that does not require a prescription puts your health at serious risk.
Severe acne on the chest and back
Severe acne often spreads past the face. The AAD says it can cover the face, chest and back, and sometimes the buttocks. Creams are hard to apply evenly on your own back. NICE says one advantage of adding an antibiotic pill to a gel for moderate to severe acne is that the pill may treat areas that are difficult to reach with a cream, such as the back. The AAD's quiz lists acne that has cleared on the face but keeps going on the back or chest as one reason to see a dermatologist.
When another condition is behind the acne
Sometimes severe or sudden acne has a cause a skin product cannot reach. The AAD says acne is sometimes a sign of an underlying medical condition, and that once that condition is diagnosed and treated, the acne often clears. NICE advises doctors to consider specialist care, for example a hormone specialist, if a medical disorder or a medicine is likely to be contributing to a person's acne. NICE names anabolic steroids taken without a prescription as one example.
If you think a prescribed medicine is causing your acne, the AAD says to keep taking it and talk with the doctor who prescribed it. Ask whether acne is a known side effect and whether another medicine is possible. Hormonal acne vs regular acne covers the signs that hormones play a part.
How long prescription treatment takes
Prescription treatment is stronger and still takes time. The AAD says severe acne can take two to three months to improve. NICE reviews first treatments at 12 weeks. Once skin is clear, the AAD says you still need acne treatment, though the type may change, because without it acne can return quickly.
Who you can see
In the US, NIAMS says acne can be diagnosed and treated by dermatologists, who specialize in skin, hair and nails, and by primary care providers such as family doctors, internists and pediatricians. In the UK, the NHS says a GP can offer treatments you can only get with a prescription, or refer you to a dermatologist. A family doctor is a reasonable first stop if a dermatologist appointment is hard to get.
Preparing for the visit
Preparation helps the dermatologist choose the right plan:
- List what you have tried, with the product, strength and how many weeks you used it.
- List all your medicines, including hormone medicines and supplements. NIAMS says some medicines, such as those with hormones, corticosteroids or lithium, can cause acne.
- Say if you are pregnant or planning to be. NICE says topical retinoids and some antibiotic pills are not used in pregnancy.
- Bring photos taken in the same light over several weeks. How to take acne progress photos shows how.
- Mention how acne affects you. NICE asks doctors to take distress into account when choosing treatment.
Until the appointment
Keep using a gentle routine, and do not squeeze deep spots. The AAD says squeezing a cyst or nodule raises the risk of infection, discoloration and scarring, and that ice reduces inflammation in painful spots. Keep using any acne treatment you have started unless a doctor tells you otherwise. Skinli gives education and is not a doctor, so for deep, painful or scarring acne, the right next step is the appointment. How to get rid of acne scars explains what can be done for scars once the acne is under control.
Frequently asked questions
What is considered severe acne?
Severe acne, in the UK NICE guideline's terms, is moderate to severe acne: 35 or more inflamed spots, or 3 or more nodules, which are deep, painful lumps. The American Academy of Dermatology describes severe acne as many breakouts that can cover the face, chest and back, with deep, painful cysts and nodules that often leave scars when they clear.
What does severe acne look like?
Severe acne looks like many red, inflamed breakouts plus deep, painful lumps called cysts and nodules, according to the American Academy of Dermatology. It can cover the face, chest and back, and can also appear along the jawline and neck. The AAD says many blackheads and whiteheads may appear too, and that acne scars often appear as severe acne clears.
When to see a dermatologist for acne?
See a dermatologist for acne that causes deep, painful cysts or nodules, leaves scars or dark spots, has not cleared with treatment you can buy, or affects your mood, according to the American Academy of Dermatology. The UK NICE guideline advises considering specialist referral for mild to moderate acne that has not responded to two completed courses of treatment, and for acne that is leading to scarring.
Should I see a dermatologist for acne?
Many people with acne can benefit from a dermatologist, and the American Academy of Dermatology says you do not need severe acne to go. Its quiz lists signs such as trying everything without success, new breakouts after clearing, and feeling depressed or anxious because of acne, and says to see a dermatologist if six or more apply. Dermatologist Julie Harper says no acne is too mild to potentially benefit.
How do dermatologists treat acne?
Dermatologists treat acne with prescription creams and gels, pills and in-office procedures, chosen by the type and severity of acne, according to the American Academy of Dermatology. For severe acne, the AAD says the first treatment is often an antibiotic pill plus a medicine applied to the skin. Isotretinoin, birth control pills, spironolactone, steroid injections and drainage of large cysts are other options.
Can severe acne go away without treatment?
Severe acne can fade with time, but the American Academy of Dermatology says waiting it out can take years, and that it cannot be cleared with acne treatment bought at a store. When severe acne clears, acne scars often appear, the AAD says. The UK NICE guideline says the risk of scarring increases with how severe acne is and how long it lasts.
Can severe acne cause depression?
Acne of any severity can cause psychological distress and mental health disorders, the UK NICE guideline says, and the American Academy of Dermatology says many studies have found acne can lead to poor self-esteem, depression or anxiety. NICE advises considering referral to a dermatologist for acne causing persistent distress, and to mental health services where there is significant distress, self-harm or suicidal thoughts.
Is going to a dermatologist worth it for acne?
A dermatologist visit is worth it when acne is deep, scarring, or not clearing with store products, because the American Academy of Dermatology says those types need prescription treatment. The AAD says isotretinoin, a prescription pill, gives permanent clearing after one course in 85 percent of patients. In the US, a family doctor can also treat acne, according to the National Institutes of Health.
Which doctor treats acne?
Acne is treated by dermatologists, who specialize in skin, hair and nails, and by primary care providers such as family doctors, internists and pediatricians, according to the US National Institute of Arthritis and Musculoskeletal and Skin Diseases. In the UK, the NHS says a GP can offer prescription acne treatment or refer you to a dermatologist, and NICE lists when that referral should happen.
How long does isotretinoin treatment take?
One course of isotretinoin takes four to five months, according to the American Academy of Dermatology, and dermatologists adjust the length for each patient. In the US, patients must enroll in the FDA's iPLEDGE risk program and see their dermatologist every 30 days. The 2024 AAD guideline strongly recommends isotretinoin for acne that is severe, scarring, causing distress, or not responding to standard treatment.
Sources
- What can clear severe acne? (American Academy of Dermatology)
- Acne vulgaris: management (NG198), Recommendations (National Institute for Health and Care Excellence (NICE))
- Guidelines of care for the management of acne vulgaris (Journal of the American Academy of Dermatology, PubMed record)
- Acne: Diagnosis and treatment (American Academy of Dermatology)
- Isotretinoin (American Academy of Dermatology)
- Treating acne? Is it time to see a dermatologist? (American Academy of Dermatology)
- Adult acne treatment dermatologists recommend (American Academy of Dermatology)
- 9 things to try when acne won't clear (American Academy of Dermatology)
- Acne: Diagnosis, Treatment, and Steps to Take (National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH))
- Acne (NHS)
- Acne: MedlinePlus Medical Encyclopedia (MedlinePlus, U.S. National Library of Medicine)
- Adult acne: Why it happens and what you can do for it (American Academy of Dermatology)
- Pimple popping: Why only a dermatologist should do it (American Academy of Dermatology)
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Analyze my skinSkinli gives simple tips for skin with pimples. It is not a doctor. It cannot tell you what is wrong the way a doctor can. If your pimples hurt, are deep under the skin, are getting worse, or will not go away, see a doctor.