Do you think it is common? It seems to be your own nose, right?
Because this disease is really common, the diagnosis is clear-seborrheic dermatitis.
Then what is its pathogenesis?
At present, the specific reasons are still unclear. Seborrheic dermatitis, unlike acne, is not a sebaceous gland disease, and the sebum excretion rate of patients has not accelerated.
However, sebaceous glands seem to be closely related to seborrheic dermatitis, because the lesions are basically prone to occur in areas with a large number of sebaceous glands, such as both sides of the nose, eyebrows, external auditory canal and scalp.
Ask and answer. A
That seborrheic dermatitis must be unique to oily skin. Is it a patent for oily skin?
A: The answer is no. In fact, many patients with seborrheic dermatitis often show dry skin and desquamation.
So what role does sebaceous glands play in the pathogenesis of seborrheic dermatitis?
A: Some scholars speculate that sebaceous glands may have played a role in creating a favorable environment for Malassezia.
Is it necessary to detect Malassezia for seborrheic dermatitis?
A: It doesn't make much sense, because Malassezia is a lipophilic microorganism (living on sebum) and a part of normal skin flora.
However, the direct evidence supporting the involvement of Malassezia in the etiology of seborrheic dermatitis is limited. The existing studies have not confirmed that the density of Malassezia in the skin of sick individuals is high, nor has it been confirmed that the skin colonization intensity of Malassezia is related to the severity of seborrheic dermatitis.
The reason why many people think that Malassezia plays a role in seborrheic dermatitis may be because most effective drugs have antifungal activity.
Thirdly, according to some research results, it is not confirmed that the colonization of Malassezia is reduced after topical ketoconazole treatment, so the effective reason may be the nonspecific anti-inflammatory effect of antifungal drugs.
Forget it. I'm dizzy. I'm calling the police. Let's talk about how to make this nasal groove not red.
So what should we do?
There are three main points: anti-inflammatory, anti-fungal and exfoliating.
I. Anti-inflammatory
1. Topical hormone drugs, generally choose weak topical hormone ointment, such as hydrocortisone, desonide, etc., until the symptoms improve, and then slowly reduce the amount to maintain. It is estimated that when it comes to hormones, many people will dump them like radishes. In fact, any drug has certain risks, as long as the standardized use of hormonal drugs is safe.
2. If you really hate hormone drugs, you can also choose calcineurin inhibitors, such as 0.03% tacrolimus and 0. 1% pimecrolimus, which may cause slight irritation and burning sensation at first, and can generally be tolerated after continuous use for 3-5 days.
Second, anti-fungi.
1.2% ketoconazole cream or other azole drugs, 1-2 times a day 1 time.
2. Selenium disulfide lotion or ketoconazole lotion, used 2-3 times a week.
3. 1% ciclopirox amine cream, 1-2 times a day 1 time.
4. For those who are heavier or more difficult to treat, the antifungal drug itraconazole can be taken orally (recommended to be used under the guidance of a doctor).
Third, exfoliate
Salicylic acid, once a day or every other day, until local symptoms are relieved, and then maintenance treatment is performed 2-3 times a week.
PS: Besides these drugs, metronidazole gel (twice a day for 8 weeks) is also effective.
For patients with intractable seborrheic dermatitis with obvious seborrhea, a small dose (0. 1-0.3mg/kg/d) of isotretinoin soft capsules can also be considered. Because of its definite teratogenic effect, contraception must be strictly controlled during and within one month after drug withdrawal, and the drug should be taken under the guidance of a specialist.
Seborrheic dermatitis usually begins in adolescence and adulthood, and there is an alternating process of recurrent episodes and remission in life. Even if the treatment is successful, recurrence is common, so the follow-up maintenance treatment is very important.
Can seborrheic dermatitis use skin care products?
Of course, and pay more attention to skin care, because patients with seborrheic dermatitis have inflammation on their faces, and they may have had the experience of abusing or using skin care products irregularly before, which leads to the damage of skin barrier, so patients often have subjective symptoms of sensitive skin such as tight and dry skin.
How to protect skin?
1. Jiepi: I really don't know how to choose a gentle cleansing product. You can wash your face with warm water, and be gentle when you wash your face, just like first love.
2. Moisturizing: According to local conditions, use different moisturizing products, whether it is moisturizing lotion or moisturizing cream, as long as it can achieve the purpose of moisturizing, you will feel comfortable after using it.
3. Sun protection: following the abc principle, A is the best sun protection, that is, not being exposed to the sun, B is sheltering from the sun, such as wearing a hat or playing an umbrella, and C is applying sunscreen.
In fact, UVA and UVB inhibit the growth of Malassezia species, and lead to the improvement of summer symptoms (seborrheic dermatitis is often aggravated in cold and dry winter), so moderate sunlight exposure is also beneficial to seborrheic dermatitis, but if you don't pay attention, you will be tanned or sunburned.
Cover source: Band-Aid
The data in this paper were updated on 20 19, 10, 2 1.
Popular science content can not replace the doctor's diagnosis and treatment advice, for reference only.
If you have skin problems, please consult a doctor in time.