What are the causes of alopecia areata?

Written by Liu Gang
Dermatology
Updated on December 30, 2024
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The causes of alopecia areata are numerous, and the contributing factors may vary from person to person. Decreased immunity, frequent staying up late, anxiety, tension, poor mood, or long-term drinking and smoking, consuming spicy or strongly flavored foods, and lack of vitamins and trace elements, as well as local injuries, or frequent occurrences of folliculitis, abscesses, and cysts are all primary factors. Only a small number of cases may be related to genetics. Once diagnosed, it is essential to seek treatment from reputable medical institutions. Follicular tests can also be conducted to check for atrophy or necrosis. Generally, with persistent treatment, it is entirely curable.

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Written by Huang Ling Juan
Dermatology
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How long does the hair loss phase of alopecia areata usually last?

The shedding phase of alopecia areata generally lasts about three months. Alopecia areata refers to the sudden occurrence of patchy hair loss on the top of the head, usually caused by excessive mental stress, fatigue, and disorders of the immune system. Alopecia areata typically arises when various factors cause the hair follicles on the scalp to shift from the growth phase to the resting phase, resulting in the hair no longer growing and subsequently falling out extensively. The occurrence of alopecia areata is also somewhat related to genetics. If dieting leads to malnutrition, alopecia areata may also occur. The clinical manifestation of alopecia areata is the appearance of round or oval patches of hair loss on the top of the head. Some occur individually, while others may appear in multiples, varying in size and without any subjective symptoms. If alopecia areata occurs, it is advisable to seek diagnosis and treatment in the dermatology department of a standard hospital.

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Written by Liu Gang
Dermatology
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Can people with alopecia areata dye their hair?

Alopecia areata often occurs mostly due to decreased immunity or eating spicy, irritating foods, foods with overly strong flavors, frequently staying up late, anxiety, tension, and bad moods. Once alopecia areata appears, it is necessary to seek formal treatment, avoid dyeing or perming hair, and avoid using irritating hair gels. It is advisable to maintain hair hygiene with clean water or warm water washing, in conjunction with formally prescribed oral and topical medications, and local medication occlusion treatment can also be coordinated. If the symptoms are severe, one may also visit a formal hospital to check if the hair follicles have atrophied or died. Avoiding spicy, irritating foods, enhancing exercise, and strengthening immunity can completely cure the condition.

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Written by Liu Jing
Dermatology
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What should I do if a patch of alopecia areata doesn't grow back?

Alopecia areata, commonly known as "ghost shaving," is a type of immune-related skin disease. It is important to rest, provide immune modulation and other symptomatic treatments, eat more black-colored foods, and maintain a good mood. Take oral thymopeptide enteric capsules, cysteine tablets, vitamin B6 tablets, folic acid tablets, and other medications. For the bald areas, apply a 5% concentration of minoxidil spray and heparin polysulfate mucopolysaccharide cream. The purpose is to improve scalp microcirculation to stimulate hair follicles and promote hair regeneration. Simultaneously, supplementary physical therapy measures can be used, including traditional Chinese medicine techniques such as plum-blossom needle tapping and local treatment with 308 nm excimer laser radiation, three times a week, for a total of ten sessions per treatment course.

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Written by Liu Jing
Dermatology
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How long does it generally take for a small patch of alopecia areata to recover?

Alopecia areata, commonly known as "ghost shearing", is often related to immune factors in its causes and mechanism of onset. It is important to rest and provide symptomatic treatment with immune modulation. Generally, recovery can be expected within about a month. Oral medications such as cysteine tablets, folic acid tablets, vitamin B6 tablets, and pimecrolimus granules can be taken. In the area affected by alopecia areata, topical application of dermatan sulfate polysaccharide cream, tacrolimus ointment, combined with the use of minoxidil solution is recommended to promote local circulation and thereby facilitate hair regrowth. Additionally, other physical therapy measures can be supportive, including traditional Chinese medicine treatments such as plum-blossom needle tapping and local intense pulsed light therapy. (Medication should be used under the guidance of a doctor.)

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Written by Liu Gang
Dermatology
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Does alopecia areata need treatment?

Alopecia areata is characterized by localized or patchy hair loss on the scalp. There are many causes for this condition, most of which are related to individual dietary habits and lifestyle. For instance, irregular meal times, malnutrition, or frequent consumption of spicy and stimulating foods can contribute to the condition. Additionally, staying up late, experiencing anxiety, tension, or overall poor mood can also lead to hair loss. In most cases, alopecia areata that appears for a short period can be treated through dietary adjustments. However, if the affected area is large, it is advisable to seek professional treatment at a dermatology department of a formal hospital; otherwise, the area of hair loss may continue to expand. If it progresses severely, it might lead to complete hair loss or even loss of eyebrows.