The short answer: See a dermatologist for an ingrown hair or any other skin bump when it is spreading, very painful, hot, swollen or filled with pus; when it comes with fever or chills; when it keeps coming back or hasn’t improved after a few weeks of home care; when it leaves dark spots, scars or keloids; or when a spot is new, changing, bleeding or looks different from the others. Get urgent care for a painful boil on the face, a boil with fever, or any infected bump if your immune system is weakened.
Most bumps on the arms, legs, bikini line and beard area are not dangerous. Keratosis pilaris, razor burn, clogged pores and the occasional ingrown hair usually respond to gentle care. But a handful of signs mean a bump needs a professional look, either because it may be infected, because it may scar, or because it may not be what you think it is.
This checklist covers the bumps people most often bring to a dermatologist: ingrown hair problems, folliculitis, keratosis pilaris and “acne” that won’t clear, along with the warning signs that apply to any spot on your skin.
In this article
Get urgent care if
Some signs shouldn’t wait for a routine appointment. The NHS advises urgent care for a boil on the face, a boil with a high temperature or chills, or a boil in someone with a weakened immune system. Cleveland Clinic says to contact a provider right away if folliculitis is spreading, if spots become firm or painful, if they drain fluid, or if you develop fever, chills or fatigue.
See a board-certified dermatologist if
- A painful, swelling lump on the face.
- Fever, chills or feeling generally unwell along with a bump or rash.
- Redness or swelling that is spreading quickly from a bump.
- A boil or infected bump when you have diabetes, take immune-suppressing medicine or have a weakened immune system.
Signs a bump may be infected
Ingrown hairs and inflamed follicles can become infected. The NHS advises seeing a doctor if the area around an ingrown hair is very painful, hot or swollen, or if you have signs of infection such as fever, chills or feeling unwell. Cleveland Clinic adds that an ingrown hair cyst that keeps growing, leaks pus or becomes more painful needs medical attention.
Watch for:
- Pus, warmth or throbbing pain.
- A bump that keeps getting bigger over several days.
- A firm lump under the skin, which may be a boil. The NHS describes a boil as a hard, painful lump that fills with pus; a cluster of them is called a carbuncle.
The NHS also advises against picking, squeezing or piercing a boil. A clinician can drain it safely if needed. See our guide to folliculitis for the different types and how they are treated.
Bumps that aren’t improving
Home care has reasonable timelines, and it helps to know them.
| Condition | Typical timeline with home care | See a dermatologist if |
|---|---|---|
| Ingrown hair | Most clear within 1 to 2 weeks | It lasts longer, grows, or keeps recurring |
| Razor burn | A few hours to a few days | It lasts more than a few days or looks infected |
| Mild folliculitis | Often improves within a few days | It spreads, recurs or comes with fever |
| Boil | Should improve; see a doctor if it lasts 2 weeks | It’s on the face, recurs or comes with fever |
| Keratosis pilaris | Improvement in 4 to 6 weeks of consistent care | No improvement after 4 to 6 weeks |
The timelines come from Cleveland Clinic’s guides to ingrown hairs, razor burn and folliculitis; from the NHS for boils; and from the American Academy of Dermatology (AAD) for keratosis pilaris.
Key takeaways
- Fever, spreading redness, a painful lump on the face or a weakened immune system call for prompt care.
- Pus, warmth, growing size or a firm lump suggest infection.
- Bumps that outlast normal timelines or keep returning deserve a diagnosis.
- Any new, changing, bleeding or unusual spot should be checked.
Bumps that keep coming back
Recurrence is one of the best reasons to see a dermatologist, because it often means the cause hasn’t been pinned down.
Recurring ingrown hairs and razor bumps
If razor bumps persist after you’ve changed your shaving habits, the AAD recommends seeing a board-certified dermatologist. Options such as prescription treatments and laser hair removal aren’t available over the counter. See our guide to ingrown hairs for what a dermatologist may offer.
“Acne” on the chest and back that won’t clear
Itchy, uniform bumps on the chest, back or shoulders that don’t respond to acne treatment may be a yeast infection of the follicles. Cleveland Clinic recommends seeing a provider for acne that resists standard treatment for this reason. Our guide to Malassezia folliculitis explains how it’s diagnosed.
Repeated boil-like lumps in the armpits or groin
Painful lumps that keep returning in the armpits, groin, buttocks or under the breasts may not be ingrown hairs at all. The NHS describes hidradenitis suppurativa as a painful, long-term condition that causes boil-like lumps, abscesses and scarring in exactly those areas, and notes that it can be mistaken for acne or ingrown hairs. It affects about 1 in 100 people, isn’t infectious and isn’t caused by poor hygiene. The NHS stresses that early diagnosis matters, because treatment works better in the early stages.
Dark spots, scars and keloids
For many people, the marks are worse than the bumps. DermNet lists postinflammatory hyperpigmentation and scarring, including keloids, among the complications of razor bumps. The AAD warns that untreated chronic razor bumps can leave permanent deep grooves and raised scars.
See a dermatologist if:
- Each crop of bumps leaves new dark spots, especially on brown or Black skin.
- You notice raised, firm scars forming where bumps were.
- You have a personal or family history of keloids and are getting frequent bumps.
The NHS advises against scratching, picking or squeezing ingrown hairs because it can damage the skin and lead to infection. If your bumps are rough and long-standing, our guide to keratosis pilaris covers gentler care.
Red flags for any spot on your skin
Not every bump is a hair follicle problem. The AAD advises seeing a board-certified dermatologist for new spots, spots that are different from others, or spots that are changing, itching or bleeding. Its ABCDEs of melanoma describe warning features of a spot:
- Asymmetry: one half is unlike the other.
- Border: irregular, scalloped or poorly defined.
- Color: varies from one area to the next.
- Diameter: usually larger than 6 millimeters, about the size of a pencil eraser, though melanomas can be smaller.
- Evolving: looks different from the rest or is changing in size, shape or color.
A single dark “dot” on the leg that looks different from the others, grows or bleeds should not be written off as strawberry legs. Have it checked.
What to expect at the appointment
A dermatologist will usually start by examining the skin and asking about your history. Cleveland Clinic notes that for folliculitis, providers ask about sweating, hot tub use, shaving habits and medications. For recurring or unusual bumps, a quick test may help. Cleveland Clinic notes that a skin scraping examined under a microscope can reveal yeast, and that a biopsy may be done when the diagnosis is unclear.
It helps to bring:
- Photos of the bumps at their worst, if they come and go.
- A list of products, hair removal methods and medicines you use.
- Notes on timing: when bumps appear relative to shaving, workouts or hot tub use.
Frequently asked questions
Should I see a dermatologist for an ingrown hair?
Most ingrown hairs clear on their own within one to two weeks. See a dermatologist if one is very painful, hot, swollen or leaking pus, if you have a fever, if bumps keep coming back, or if they leave dark spots or scars.
Can a dermatologist remove an ingrown hair?
Yes. The NHS notes that a doctor can release a trapped hair using a sterile needle or blade, and a dermatologist can also treat inflammation and recommend long-term options such as laser hair removal for recurring cases.
When is a boil an emergency?
The NHS advises urgent care for a boil on the face, a boil with fever or chills, or any boil when your immune system is weakened. Spreading redness or feeling unwell also warrants prompt medical attention.
How do I know if a bump is something serious?
Warning signs include fever, rapidly spreading redness, a bump that keeps growing, and any spot that is new, changing, bleeding or looks different from the others. When in doubt, have it examined by a board-certified dermatologist.
Sources
- NHS. “Boils.” NHS.uk. source
- NHS. “Ingrown hairs.” NHS.uk. source
- NHS. “Hidradenitis suppurativa (HS).” NHS.uk. source
- Cleveland Clinic. “Folliculitis.” Cleveland Clinic Health Library. source
- Cleveland Clinic. “Ingrown Hair.” Cleveland Clinic Health Library. source
- Cleveland Clinic. “Ingrown Hair Cyst.” Cleveland Clinic Health Library. source
- Cleveland Clinic. “Pityrosporum (Malassezia) Folliculitis.” Cleveland Clinic Health Library. source
- American Academy of Dermatology. “Keratosis pilaris: Diagnosis and treatment.” AAD.org. source
- American Academy of Dermatology. “Razor bump remedies for men with darker skin tones.” AAD.org. source
- American Academy of Dermatology. “What to look for: ABCDEs of melanoma.” AAD.org. source
- DermNet. “Pseudofolliculitis barbae.” DermNet. source
- Cleveland Clinic. “Razor Burn.” Cleveland Clinic Health Library. source
This article is for general information and isn’t a substitute for professional medical advice, diagnosis or treatment.