Underarm pigmentation—often called armpit darkening, underarm discolouration, or axillary pigmentation—is a common concern, particularly among individuals with medium to deep skin tones (Fitzpatrick III–VI) and those of Southeast Asian heritage. Although generally harmless, uneven underarm colour can affect confidence and comfort.
This page outlines the causes of underarm pigmentation and the evidence-based options that may help improve overall skin tone.
What Causes Dark Underarms?
1. Friction and Shaving
Shaving, waxing, or friction from tight clothing can irritate the skin and stimulate melanin production.
2. Post-Inflammatory Hyperpigmentation (PIH)
Inflammation from ingrown hairs, deodorants, friction or heat may lead to pigment overproduction. PIH is particularly common in deeper skin tones.
3. Excess Moisture and Sweating
High humidity and sweating can increase friction and irritation, making pigmentation more noticeable and persistent.
4. Genetic and Skin-Type Factors
Individuals with Southeast Asian or darker skin types naturally have more active melanocytes, making them more prone to underarm darkening.
5. Hormonal or Metabolic Factors
Certain metabolic conditions may also contribute to darker skin in the underarm region.
Treatment Options for Underarm Pigmentation
A personalised consultation is essential to understand the underlying cause and select the most appropriate approach.
1. Gentle Laser Toning (1064 nm Q-Switched or Picosecond Laser)
Laser toning uses short-pulse energy to help:
- Break down excess pigment
- Promote natural melanin metabolism
- Improve uneven skin tone with minimal downtime
Suitable for a range of skin types, including Fitzpatrick III–VI, when assessed by an experienced practitioner.
2. Managing Excess Sweating (Hyperhidrosis)
For people with excessive underarm sweating, moisture can cause ongoing irritation and worsen pigmentation.
During consultation, a doctor may discuss prescription-only treatment options that reduce sweat gland activity. By lowering sweat production, these treatments can reduce:
- Friction
- Irritation
- Triggers that lead to further pigmentation
This can be especially beneficial for Southeast Asian skin types or individuals with sensitivity in the underarm region.
(In accordance with Australian advertising regulations, specific product names are not listed.)
3. Topical Brightening Creams
Depending on your skin assessment, topical options may include:
- Mild hydroquinone (short-term, supervised use)
- Niacinamide, azelaic acid, kojic acid, vitamin C
- Skin barrier–strengthening creams
These can help reduce pigment formation and prevent repeated irritation.
4. Oral Pigmentation-Supporting Medications
Certain oral agents may help reduce pigment through systemic pathways. These require professional medical assessment for suitability.
5. Lifestyle & Skincare Adjustments
Simple habits can help prevent recurrent pigmentation:
- Choose fragrance-free, alcohol-free deodorants
- Avoid harsh scrubbing and abrasive exfoliants
- Trim instead of shaving frequently
- Wear breathable cotton clothing
- Maintain a healthy skin barrier with moisturisers
When Should You Seek Advice?
Because underarm pigmentation can result from multiple factors—and because deeper skin tones require thoughtful, individualised treatment—it’s best to seek a professional consultation for accurate diagnosis and safe treatment planning.
⭐ Book a Consultation at Medical Aesthetics 360°
If you would like personalised advice, you can book in to see one of our doctors at Medical Aesthetics 360°.
We offer two convenient clinic locations to suit your needs:
- Chatswood
- Hurstville
Our medical team has more than 10 years of clinical experience, and our centres are equipped with state-of-the-art technology designed for safe and evidence-based care.
Whether you’re concerned about underarm pigmentation or simply want professional guidance on your skin, our doctors can provide a thorough assessment and personalised treatment plan.
