{"id":4280,"date":"2024-06-25T21:04:50","date_gmt":"2024-06-25T12:04:50","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/aga\/hair-density-in-aga\/"},"modified":"2026-07-09T01:14:36","modified_gmt":"2026-07-08T16:14:36","slug":"hair-density-in-aga-en","status":"publish","type":"post","link":"https:\/\/www.hiro-clinic.or.jp\/aga\/hair-density-in-aga-en\/","title":{"rendered":"What is the density of hair in case of AGA?"},"content":{"rendered":"\n<p>The density of hair during <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> (male pattern baldness) varies from person to person, but the following characteristics are generally observed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Healthy scalp hair density<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Normal density<\/strong>: A healthy adult scalp averages about 100 to 150 hairs per square centimeter.<\/li>\n\n\n\n<li><strong>Normal balance of the hair cycle<\/strong>: In a healthy scalp, about 85-90% of hairs are in the growth phase, with the remainder in the resting or regression phase.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Density of scalp hairs affected by <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thinning Hair Progression<\/strong>: As <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> progresses, hair density decreases significantly. Specific densities vary depending on individual symptoms and progression, but tend to be as follows<\/li>\n\n\n\n<li><strong>Initial stage<\/strong>: The density of hairs decreases slightly, often to 70-100 hairs per square centimeter.<\/li>\n\n\n\n<li><strong>Intermediate stage<\/strong>: Hair density decreases further and may be as low as 50-70 hairs per square centimeter.<\/li>\n\n\n\n<li><strong>Late stage<\/strong>: As <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> progresses to a severe stage, hair density decreases further and may be as low as 20 to 50 hairs per square centimeter.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Hair miniaturization<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Increased thin and short hair<\/strong>: In <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a>, DHT (dihydrotestosterone) causes hair follicles to shrink and hairs to miniaturize. This results in hair that appears thinner, shorter, and less dense.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Visual impact<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Appearance of thinning hair<\/strong>: As hair density decreases, the skin becomes more visible. Thinning of hair, especially in the frontal and parietal areas, increases the overall impression of thinning hair.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Evaluation Method<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dermoscopy<\/strong>: Assesses hair density and degree of miniaturization using a dermoscope (magnifying glass).<\/li>\n\n\n\n<li><strong>Tricoscan<\/strong>: Quantitatively assesses hair density and the ratio of growing to resting hairs using digital images.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Significance<\/h3>\n\n\n\n<p>Assessment of hair density is important for diagnosing <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> and evaluating the effectiveness of treatment. By comparing hair density before and after treatment, the effectiveness of treatment can be confirmed.<\/p>\n\n\n\n<p>Since the progression of <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> and changes in hair density vary greatly from person to person, proper diagnosis and evaluation by a specialist is necessary.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Q1; Specifically, how many or less is abnormal?<\/p>\n\n\n\n<p>A1: To specifically assess the progression of <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> (male pattern baldness), it is important to know how many hairs are considered thinning when their density falls below a certain number. As a general guide, the following criteria are used.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hair Density Criteria<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Healthy scalp<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On average, there are approximately 100 to 150 hairs per square centimeter.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Mild thinning hair<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When the density of hairs reaches 70 to 100 per square centimeter, early thinning of hair is considered to have begun.<\/li>\n\n\n\n<li>At this stage, the thinning of the hair can be felt gradually, although it is often not yet noticeable.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Moderate thinning hair<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When hair density decreases to about 50-70 hairs per square centimeter, thinning hair begins to become evident.<\/li>\n\n\n\n<li>The skin of the skin becomes more transparent and thinning hair becomes more noticeable, especially on the top and frontal areas of the head.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Severe thinning hair<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When the density of hairs reaches 20 to 50 hairs per square centimeter, it is considered severely thinning.<\/li>\n\n\n\n<li>At this stage, the crust is clearly visible and hair volume is greatly reduced.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Criteria for determining the progression of hair loss<\/h3>\n\n\n\n<p>The progression of <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a> is evaluated by observing changes in hair density in conjunction with the Norwood-Hamilton classification. The following specific criteria are used<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Less than 50 hairs<\/strong> <strong>per square centimeter<\/strong>: At this stage, obvious thinning is evident and treatment is strongly recommended.<\/li>\n\n\n\n<li><strong>Less than 30 hairs per square centimeter<\/strong>: Severe thinning and requires aggressive treatment. Hair transplant surgery may be considered.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Methods of Measuring Hair Density<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dermoscopy<\/strong>: A magnified view of the scalp is used to examine hair density and follicle condition in detail.<\/li>\n\n\n\n<li><strong>Trichogram<\/strong>: A hair is pulled out and observed under a microscope to check the ratio of growing hairs to resting hairs.<\/li>\n\n\n\n<li><strong>Tricoscan<\/strong>: A method of quantitatively evaluating hair density using digital images.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Treatment Timing<\/h3>\n\n\n\n<p>Starting treatment before hair density falls below 50 hairs increases the likelihood of delaying or improving the progression of the disease. Early detection and appropriate treatment are important.<\/p>\n\n\n\n<p>Evaluation by a specialist is essential for the diagnosis and treatment of <a href=\"https:\/\/www.hiro-clinic.or.jp\/aga\/\">AGA<\/a>. We recommend that you see a specialist in order to select the best treatment for your individual case.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The density of hair during AGA (male pattern baldness) varies from person to person, &#8230;<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"meta_title":"","meta_description":"","footnotes":""},"categories":[51],"tags":[],"class_list":{"0":"post-4280","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-aga-en","7":"article"},"acf":[],"_links":{"self":[{"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/posts\/4280","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/comments?post=4280"}],"version-history":[{"count":1,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/posts\/4280\/revisions"}],"predecessor-version":[{"id":4290,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/posts\/4280\/revisions\/4290"}],"wp:attachment":[{"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/media?parent=4280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/categories?post=4280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/aga\/wp-json\/wp\/v2\/tags?post=4280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}