Nodular Acne: What to Log and Ask Before a Dermatology Visit

Item	Detail	Basis
Count cutoff	Under the UK NICE criteria, 3 or more nodules counts as moderate to severe, and 2 or fewer as mild to moderate	2024 PMID 39305432 · A
Scarring risk	In a meta-analysis of 24,649 people with acne, 47% had scars, and severe acne carried 5.51 times the odds of scarring compared with mild acne (odds ratio)	2023 PMID 37357642 · A
Timing of care	Of 100 patients with acne scars, 52 did not start care until a year after their acne began	2020 PMID 33208997 · B
What to record	Past medicines and how you reacted, other medicines, family history, whether you scar easily, and for women, cosmetics and menstrual cycle	Korean Dermatological Association · institution
Cyst clues	An epidermal cyst has a central opening, is 1–5 cm across, feels soft and moves separately from the tissue beneath	Korean Dermatological Association · institution

How many hard lumps under the skin mean you should hurry?

If you have 3 or more hard lumps that hurt when you press them, it’s better not to put off a visit. The NICE criteria summarized in 2024 by the UK Acne Working Group, a British expert group, place 3 or more nodules or 35 or more inflamed lesions in the moderate-to-severe range, and 2 or fewer nodules with 34 or fewer inflamed lesions in the mild-to-moderate range.

The same summary notes that severity should be judged not only by count but also by location, lesion size and how much it affects your daily life. The Korean Dermatological Association explains that nodules are more common in men and that several deep nodules can join together to form tender tunnels (sinus tracts) under the skin. Add a separate column to your log for whether lumps feel connected into a longer ridge.

Is it OK to wait for it to settle on its own?

There’s no evidence that sets how long settling takes, but there is evidence that scarring risk adds up while you wait. In a 2023 meta-analysis pooling 37 studies and 24,649 people, scar prevalence was 46% with mild acne, 67% with moderate acne and 82% with severe acne, and having a family member with acne raised the odds 2.73 times (odds ratio).

In a 2020 study of 100 people with acne scars, 52 did not start care until a year after their acne began, and 18 had never been seen at all. This is an observation that late care and worse scarring showed up together, so it can’t prove one caused the other. Still, it’s safer to decide whether to wait at a visit, after you’ve logged the number of lumps and your family history.

What records should you bring to the appointment?

Turn the items the Korean Dermatological Association says it checks before starting care into columns in your log. The basics are which acne medicines you’ve tried and how you reacted, other medicines you take, family history and whether you scar easily. For women, it also looks at which cosmetics you use, whether your periods are regular and whether body hair has increased.

The Korea Disease Control and Prevention Agency (KDCA) also advises telling your doctor which cosmetics and medicines you have been using, since some of them can cause an acne-like rash. If you are a student, note exam dates; if you work, note interviews or presentations. Dates that make you feel rushed help when your doctor plans care.

How can you tell a cyst from acne?

There are four clues: a central opening, softness, movement and count. The Korean Dermatological Association describes an epidermal cyst as a sac under the skin filled with keratin, with a central opening like a blackhead, 1–5 cm across, soft to the touch and moving separately from the tissue below, and says pressing it releases a smelly, cheese-like material.

Epidermal cysts usually come as one or just a few, often on the face, neck or trunk. On the other hand, several lumps showing up in the same stretch of time and hurting when pressed point more toward acne. You can’t settle this at home, so note “opening or none,” “soft or hard” and “moves or doesn’t” next to your photos and have a dermatologist sort it out.

What should you ask your dermatologist?

Write down three questions first: “What stage is this by current criteria?”, “When can we judge whether it’s working?” and “How high is my scarring risk?” A 2016 expert consensus splits acne into comedonal, papulopustular and nodular types and lays out a different path for each, so the type shapes the direction of care.

The Korean Dermatological Association explains that when oral medicine is used, it usually takes 6–8 weeks to judge the effect, and notes that women with irregular periods or increased body hair may need hormone tests. If that applies to you, add “Do I need hormone testing?” to your list. The full steps for a prescription consult continue in Preparing for an acne prescription consult with a log to bring to the clinic.

Two-week lump log before your appointment

Date	Hard, tender lumps (count)	Size of the largest	Location	Pain when pressed (0–3)	Feels joined into a ridge	Squeezed or pressed it	Menstrual cycle (if it applies)
Day 1	e.g., 3	e.g., pea	Jawline, cheeks, back, chest	2	Yes / No	Yes / No	e.g., cycle day 21
Day 4
Day 7							Week-one summary
Day 10
Day 14							Appointment date

Under the table, add one line each for medicines you’ve tried and how you reacted, medicines you take now, cosmetics you use daily, and whether anyone in your family has acne scars. Take photos in the same light, including side views of your face, so size changes are easy to compare.

When should you stop waiting and book a visit?

• If you have 3 or more hard lumps that hurt when pressed, or several that feel joined into a longer ridge, take your log to a dermatologist.
• If dents or marks are starting to form where lumps have settled, or someone in your family has acne scars, don’t delay a visit.
• If a lump with a central opening grows or turns red, swollen and painful, don’t squeeze it. Have a dermatologist check it.
• If your acne got worse along with irregular periods or more body hair, ask a dermatologist whether you need hormone tests.

Key studies behind this guide

• In a 2023 meta-analysis of 24,649 people with acne (PMID 37357642), scar prevalence was 47%, and scarring risk was higher with moderate acne (OR 2.34), severe acne (OR 5.51) and a family history (OR 2.73).
• In a 2020 study of 100 people with acne scars (PMID 33208997), 52 did not start care until a year after onset, and 18 had never been seen.
• The NICE criteria in the 2024 UK Acne Working Group summary (PMID 39305432) classify 3 or more nodules or 35 or more inflamed lesions as moderate to severe.