Patient's question:
Acne on face, painless and itchy, started at 1 year old, possibly geneticDoctor's answer:
Keratosis pilaris? This name sounds professional, but its prevalence is quite common. Surveys in the United States show that about 40% of people suffer from keratosis pilaris. In fact, many people have this condition without even realizing it. You can carefully examine your skin—if the pores are slightly red or feel like small, raised bumps when touched, this is keratosis pilaris. If it's more severe, the pores may become darker, appearing reddish or brown, and the bumps may become rougher, resembling chicken skin. It most commonly appears on the outer arms, thighs, neck, and sometimes even the entire back or cheeks.Generally, keratosis pilaris is painless, itchy, and does not lead to any serious conditions, so many people with the condition may not pay much attention to it. However, for those who value appearance, it can be a significant issue. It tends to develop during puberty and persists until the age of 40, gradually fading with age. However, the period when it is most noticeable is also when people are most concerned about their appearance. Some patients may feel self-conscious and even wear long sleeves and pants on hot days to hide the condition. More severely, some may mistake the bumps for acne or blackheads and develop a desire to "get rid of them," leading to squeezing or picking, which can cause more inflammation and hyperpigmentation.
Keratosis pilaris, also known as follicular keratosis, is a genetic skin condition primarily caused by keratinization of the hair follicle openings and is closely related to fat metabolism. Overweight individuals are more prone to it. Beyond affecting appearance, keratosis pilaris has no other impact on daily life.
Keratosis pilaris, also known as follicular xeroderma or ichthyosis vulgaris, is a very common skin condition, with statistics showing that 80% of people suffer from it, though most only notice a few small bumps that are not easily noticeable. (This is not an isolated case.) This condition is extremely common, scientifically known as keratosis pilaris, and is a genetic disorder. It occurs due to keratinization of the hair follicle openings, which affects the growth of vellus hair, making the skin surface rough like chicken skin. In fact, each small papule contains a curled hair. This is not inflammation of the hair follicle, so anti-inflammatory medications are ineffective.
The typical features of keratosis pilaris include multiple pinpoint-sized keratotic papules, primarily distributed on the outer arms, lateral thighs, and buttocks, with occasional facial involvement, especially in children. The condition is more pronounced in winter and improves in summer. The exact cause is unknown, but it may be related to autosomal dominant inheritance.
Treatment Suggestions:
Many people with this condition visit dermatology clinics, where doctors often prescribe topical retinoic acid or anti-itch medications. However, how can it be treated? Below are some of the latest clinical and academic experiences.
Medical Advice:
1. Avoid squeezing the papules to prevent accidental inflammation and infection.
2. Oral vitamin A or a diet rich in vitamin A may help. Additionally, topical keratolytic agents can alleviate symptoms and make the skin smoother. Creams like retinoic acid or salicylic acid can be used, starting with low concentrations (e.g., 0.05%-0.1%) to avoid irritation, applied nightly. Long-term use is necessary for effectiveness.
3. For some patients, keratosis pilaris is severe and significantly affects appearance, making them reluctant to wear short-sleeved shirts in the summer. Thus, it can be considered one of the "enemies of beauty." It can severely impact mood, and some may even develop psychological issues due to it. For these patients, systemic treatment may be necessary for aesthetic reasons. Additionally, keratosis pilaris is prone to post-inflammatory hyperpigmentation, which further affects appearance.
4. It is important to emphasize that early treatment of severe keratosis pilaris is crucial, as delayed treatment can lead to unwanted hyperpigmentation and increase treatment difficulty.
5. Keratosis pilaris is a very common skin issue, difficult to fully cure, but only to improve. Since it is related to keratin, treatments often focus on keratolytic creams like retinoic acid, fruit acid, salicylic acid, and urea.
a. It is an autosomal dominant genetic condition with a 50% chance of being inherited.
b. Symptoms typically become noticeable during puberty and gradually improve by age 30-40, with no lasting aftereffects.
c. The incidence rate is as high as 40%-50%, primarily affecting the outer arms, lateral thighs, and, in severe cases, the outer sides of the elbows and calves, appearing as if keratin has accumulated at the hair follicle openings. Severe cases may also cause surrounding redness or swelling, leading to confusion with acne or inflamed papules. However, squeezing them can cause red spots. If the pores are slightly red or feel like small, raised bumps when touched, this is keratosis pilaris. If more severe, the pores may become darker (reddish or brown) and the bumps rougher, resembling chicken skin.
d. It most commonly appears on the outer arms, thighs, neck, and sometimes the entire back or cheeks. Keratosis pilaris is a congenital genetic condition. People with this condition have thickened keratin around the hair follicles, leading to blockage and small bumps.
e. Some with atopic dermatitis or ichthyosis may also have keratosis pilaris. Symptoms worsen in winter due to the condition's relation to keratin thickening, which intensifies in dry, cold climates.
f. Keratosis pilaris is often associated with vitamin A deficiency, which can cause systemic dryness, exacerbating the condition.
g. Generally, keratosis pilaris only affects appearance but causes no significant inconvenience. However, scratching can worsen it, causing tissue edema, smaller pore openings, and increased blockage, leading to acne and folliculitis. Scratches can also result in scars and hyperpigmentation, making treatment more difficult.
h. Since keratosis pilaris is related to keratin, keratolytic creams like retinoic acid, fruit acid, salicylic acid, and urea are typically used.
=> Retinoic acid works deeply, directly affecting the cell nucleus to remove abnormal keratinization, with long-term use providing significant improvement. Urea, on the other hand, has moisturizing properties and is a commonly used topical treatment for keratosis pilaris.
=> Based on patient feedback, high-concentration salicylic acid (e.g., 3.5%) is highly effective. Salicylic acid is lipophilic, allowing it to penetrate hair follicle openings along skin oils to dissolve keratin and improve symptoms. It is also cost-effective and gentle, making it suitable for higher concentrations. However, the best treatment varies, as different people respond differently to medications. With proper guidance from a doctor and consistent use, improvement is achievable.
=> However, keratin production has a cycle of about a month. These treatments only address symptoms, as the genetic condition cannot be changed, so new keratin will still exhibit keratosis pilaris. After a month, the skin gradually returns to normal. Patients should be aware of this before treatment.
=> It is recommended to apply creams after bathing when the skin is well-hydrated and softened for better absorption. If the skin feels too irritated, wait 30 minutes before applying. Additionally, moisturizing products can help reduce dryness.
=> Exfoliating bath products like scrubs, brushes, or loofahs can be used. Moderate exfoliation helps, but excessive scrubbing can damage the skin and thicken keratin. Exfoliate once a month at most.
How to Improve Keratosis Pilaris:
① Gentle exfoliation. Since keratosis pilaris is related to thickened keratin, gentle exfoliation is necessary but should not be overdone. Methods include using body wash with scrub particles, shower sponges, or bath balls, but daily use can worsen dryness. The skin's keratin renewal cycle is 28-45 days, so exfoliate once every 1-1.5 months. gentler methods include using bath salts (sea salt also exfoliates but can be drying; dead sea salt with moisturizing properties is better). You can soak in bath salts or dissolve them in plant-based body wash and apply during showers. Adding rose or sandalwood essential oils can exfoliate while moisturizing.
Many people believe daily showers are good, but for keratosis pilaris, it's better to shower every 2-3 days or just with water without body wash.
② Moisturizing is key. Keratosis pilaris is both dry and oily, so regular body lotions are insufficient. Use specialized body lotions for extremely dry skin, such as Avene Xerothermic Body Lotion, La Roche-Posay Lipikar Balm, or Vichy Nutritive Body Cream. Use moisturizing cleansers like La Roche-Posay Lipikar Syndet or Avène Hypoallergenic Gentle Soap during showers. Another key point is to keep shower water at around 40°C. In winter, hot water may feel comfortable but can strip oils and cause rapid moisture loss after exiting. This is especially harmful for keratosis pilaris. If you have the time and money, a spa moisturizing treatment can also help.
③ Don't rush. Keratosis pilaris can be tempting to "get rid of," but squeezing or picking can cause edema around pores, making them smaller and more prone to blockage, leading to acne and folliculitis. Scratches can also cause inflammation and hyperpigmentation. Avoid picking at all costs. For important events, consult a dermatologist for retinoic acid or professional fruit acid peels for temporary improvement. However, this is only a temporary fix and can weaken the skin barrier, making it drier and more sensitive. Improvement requires persistence—use moisturizing body lotions daily, no matter the season, to keep the skin beautiful.
Lifestyle Care:
Traditional Chinese Medicine (TCM) believes keratosis pilaris is caused by yin deficiency and internal heat, poor skin nourishment, congenital deficiency, and inadequate postnatal care, leading to insufficient moisture and nourishment. Trust TCM to heal keratosis pilaris!
Medicinal Formulas:
1. Internal Treatment
(1) Spleen deficiency with dampness, poor skin nourishment: Treat with strengthening the spleen, eliminating dampness, and moisturizing the skin.
Prescription: Modified Xishen Weilin Decoction:
- Atractylodes rhizome 10g, Magnolia bark 6g, Tangerine peel 6g, 12g, Alisma 9g, Poria 15g, White 9g, Slender stone 30g, Saposhnikoviae 9g, Gardenia 9g, Clematis 4.5g, Angelica sinensis 12g, Rehmannia 15g, Polygonum multiflorum 15g, Licorice 5g.
(2) Blood deficiency with poor skin nourishment: Treat with nourishing blood, dispelling wind, and moisturizing the skin.
Prescription: Modified Yangxue Runfu Decoction:
- Raw and cooked Rehmannia 30g each, Asparagus, Ophiopogon, Angelica sinensis, Scutellaria, and Gypsum 10g each, Astragalus 30g, Peach kernel, Carthamus, Schisandra 6g each, Saposhnikoviae, Schizonepeta, and Cicada skin 9g each.
2. External Treatment
Apply purple root ointment or nourishing muscle ointment twice daily.
Keratosis pilaris is characterized by skin papules and erythema. Its cause is congenital deficiency, poor postnatal care, yin deficiency and internal heat, blood deficiency and wind-dryness, leading to disharmony of qi and blood, affecting the upper body. This medicine clears heat, dispels spots, moisturizes the skin, nourishes blood, activates collaterals, improves microcirculation, and eliminates papules and erythema in the short term, leaving the skin smooth and preventing recurrence. This treatment offers a new hope for patients with chronic or recurrent keratosis pilaris. It has a short course, effective results, and no side effects. Treatment is not limited by season, gender, age, or condition duration; most patients see significant improvement within 3-6 months.
Second Medicinal Formula
Note: This is a Chinese herbal formula for generalized keratosis pilaris.
[Diagnosis] Liver and kidney yin deficiency, spleen weakness, blood deficiency, wind-dryness, and poor skin nourishment.
[Treatment] Nourish liver and kidney, strengthen the spleen, moisturize dryness, invigorate qi and blood, dispel wind, and activate collaterals.
[Formula Name] Fish Scale Decoction
[Composition]
- Rehmannia 20g, cooked Rehmannia 20g, Black sesame seeds 40g, Goji berries 15g, Polygonum multiflorum 15g, White peony root bark 15g, Bidens 15g, Angelica sinensis 20g, Ligusticum 10g, Cinnamon twigs 10g, Salvia miltiorrhiza 15g, Sophora flavescens 15g, Saposhnikoviae 15g, Cicada shell 10g, Licorice 10g, Jujubes 3.
[Usage] Decoct and drink, once daily, warm in the morning and evening.
[Source] Zhou Mingqi formula.