Hyperpigmentation Care for Underarms, VIO, and Elbows: Causes and Medical Treatment Options
目次
Underarms, VIO area, elbows – because these areas are often out of sight, the shock of discovering hyperpigmentation can be significant. Many people wonder, "Why are these areas so dark, even though I wash them thoroughly every day?" The truth is, this is usually not a matter of cleanliness, but rather the cumulative effect of friction and irritation that the skin has endured. This article will explain, step by step, the medical mechanism behind hyperpigmentation, the specific causes for the underarms, VIO area, and elbows, what can be done with self-care and its limitations, and the fundamental approaches only available at medical institutions.
The Mechanism of Hyperpigmentation – Melanin and "Friction-Induced Hyperpigmentation"
Hyperpigmentation is caused by an excessive accumulation of melanin pigment within the epidermis of the skin. Our skin has a defense mechanism: when it receives external damage, such as from UV rays or physical irritation, it produces more melanin to prevent deeper skin layers from being harmed. Normally, the produced melanin is gradually expelled through the skin's regeneration cycle (turnover). However, if friction or irritation is repeatedly applied to the same area, the signal to produce melanin does not stop, leading to the establishment of hyperpigmentation. This type of hyperpigmentation, caused by chronic repeated friction, is sometimes referred to as "friction-induced hyperpigmentation" in dermatology and is characterized by its common occurrence in areas prone to daily friction, such as the underarms, VIO area, and elbows.
In other words, hyperpigmentation is not due to accumulated dirt or poor hygiene; rather, it is a normal protective reaction of the body that results in a visible change in appearance. Understanding this mechanism helps to avoid mistaken approaches such as thinking "scrubbing hard will make it clean." In reality, vigorously scrubbing itself becomes a new irritant, creating a vicious cycle that worsens hyperpigmentation.
Causes and Characteristics of Hyperpigmentation by Body Part
| Area | Primary Cause |
|---|---|
| Underarms | Self-hair removal with razors/tweezers, antiperspirant irritation, friction from clothing |
| VIO Area | Friction from underwear, self-hair removal, dampness |
| Elbows | Leaning on hands/desks, thickened keratin due to dryness |
Underarm Hyperpigmentation – Double Damage from Self-Hair Removal and Friction
The biggest factor contributing to underarm hyperpigmentation is self-hair removal using razors or tweezers. Razors shave hair by thinly scraping the skin's surface, and repeated use can cause tiny abrasions to accumulate on the skin, prompting melanin production as a defense mechanism each time. Plucking hair with tweezers applies strong irritation to the hair follicles, leading to surrounding hyperpigmentation and darkening of pores (ingrown hairs). Furthermore, chemical irritation from alcohol and fragrance components in antiperspirants, and daily friction from tight clothing, are also gradually progressing factors of hyperpigmentation.
VIO (Delicate Zone) Hyperpigmentation – The Inevitable Cycle of Dampness and Friction
The VIO area is a region where friction from underwear and clothing is unavoidable throughout the day, in addition to its structural characteristic of poor ventilation and proneness to dampness. Multiple irritating factors often overlap, such as friction from sanitary napkins, tight-fitting underwear, and razor burn from self-hair removal, making it an area where hyperpigmentation is even more likely to become established than the underarms. While hyperpigmentation in the delicate zone can be particularly difficult to discuss, it is not an uncommon concern at medical institutions, and many people seek treatment for the same issue.
Elbow Hyperpigmentation – Unconscious Habits of Friction
Daily habits that one might not even notice, such as resting one's chin on a hand while working at a desk or keeping elbows on a desk for long periods, are the main causes of elbow hyperpigmentation. Additionally, the elbows are an area with few sebaceous glands and are prone to dryness, which can lead to thickened keratin layers. This often manifests visually as dullness and hyperpigmentation. When friction and dryness combine, hyperpigmentation becomes more noticeable than in other areas.
What Self-Care Can Do and Its Limitations
For mild hyperpigmentation, some prevention and gradual improvement can be expected through daily moisturizing and efforts to reduce friction. However, for hyperpigmentation where melanin has already settled deep within the epidermis, it is often difficult to see significant changes with over-the-counter moisturizing creams or whitening cosmetics alone. This is because general cosmetics have limited power to suppress melanin production from within or break down existing pigment. If you are someone who says, "I've been using body cream for years, but nothing has changed," it may be a sign that you've reached the limits of self-care.
Medical Care Options
- Oral medications (tranexamic acid, Cinal, etc.) to suppress melanin production from within.
- Topical medications (hydroquinone, etc.) to directly target the affected area.
- Peeling to promote the shedding of old keratin and melanin.
- Replacing self-hair removal with medical hair removal to reduce friction and irritation itself.
The significant difference between medical care for hyperpigmentation and self-care is the ability to approach it from multiple angles by combining internal medications, external medications, and treatments. Oral medications like tranexamic acid suppress inflammation from within the body, putting a brake on new melanin production, while topical medications like hydroquinone act directly on the affected area to lighten existing melanin. Furthermore, combining this with a peeling approach to shed melanin along with old keratin allows for improvement from three directions: internal, external, and physical exfoliation. Also, if the root cause of hyperpigmentation is friction from self-hair removal, the condition will continue to improve and worsen unless the cause itself is removed. Therefore, switching from razors and tweezers to medical hair removal, though it may seem like a roundabout way, is actually an effective option.
Daily Prevention
- Switch from razors to electric shavers or medical hair removal.
- Avoid tight-fitting underwear and clothing.
- Make moisturizing a habit to reduce friction caused by dryness.
- Consciously reduce the habit of leaning on your elbows.
- Choose low-irritation antiperspirants and apply gently without rubbing.
Even if hyperpigmentation improves with treatment, if the habits of friction and irritation that caused it continue, the pigmentation will return to the same area. Alongside treatment, reevaluating the "accumulation of small irritations" in daily life forms the foundation for maintaining beautiful skin for a long time.
About Treatment at Our Clinic
At Mona Clinic, we offer hyperpigmentation care using skin-beautifying oral medications, including tranexamic acid.
View Skin Beautifying Oral Medications
Frequently Asked Questions
The duration depends on the degree of hyperpigmentation, but you are likely to feel the effects after several months of continuous use of both oral and topical medications.
The basic approach is the same, but as it's an area close to mucous membranes, please consult with us during your examination regarding the suitable concentration and duration of use.
Hair removal itself does not cure hyperpigmentation, but it can reduce new irritation from self-hair removal, so you can expect to prevent worsening and see synergistic effects with medical care.
Yes. Skin-beautifying oral medications work on hyperpigmentation throughout the body, so you can consult us about multiple areas of concern at once.
Many over-the-counter creams have only mild effects, and their effectiveness on established hyperpigmentation is limited. Oral and topical medications used in medical institutions can target melanin with higher concentrations and stronger actions.
Hormonal changes and individual predispositions to hyperpigmentation can also play a role. If you are concerned, please discuss your constitution during your examination.
