The different phases may last for varying periods of times from several years in anagen, to a few months in telogen or several weeks in anagen. Fortunately not all hair follicles are in the same phase at the same time. So the majority of the follicles will be in anagen phase, while a smaller amount will be in the catagen phase and a few follicles will be in the telogen phase. This ensures that there is always some hair present even when the follicle is not active and the hair is not growing.

Ever since Cara Delevingne set the trend for thick eyebrows (although women on the eastern side of the Prime Meridian have been keeping their eyebrows luscious and strong since the dawn of time), the quest to keep your eyebrow hair supremely groomed and in shape has become the primary beauty concern of all women. So now that eyebrows have come into the razor sharp focus of beauty standards that women (again) need to adhere to, it can come as quite a shock for some when they start losing their eyebrow hair. One day you’re lovingly brushing out your thick luscious eyebrows and the next moment you find yourself desperately filling them in with every eyebrow pencil you can get your hands on. You’re confused. You’re anxious. You don’t know what’s going on. And you’re trying out every random hack that the internet spews at you to stop losing your eyebrow hair. Lady, you need to calm down for a second. First, figure out why you’re losing your eyebrow hair in the first place. Let’s look at a few possible causes of your eyebrow hair loss.
Well, maybe that’s a new adage from instagram, but it’s true all the same: eyebrows are the essential defining feature of every woman’s face. That’s exactly why eyebrow loss can feel like a death sentence to the beauty-conscious woman. With thick, lush eyebrows in style, eyebrow loss can feel more traumatizing than ever. Hair one day, gone the next!

The hormonal process of testosterone converting to DHT, which then harms hair follicles, happens in both men and women. Under normal conditions, women have a minute fraction of the level of testosterone that men have, but even a lower level can cause DHT- triggered hair loss in women. And certainly when those levels rise, DHT is even more of a problem. Those levels can rise and still be within what doctors consider "normal" on a blood test, even though they are high enough to cause a problem. The levels may not rise at all and still be a problem if you have the kind of body chemistry that is overly sensitive to even its regular levels of chemicals, including hormones.
DLE is an autoimmune condition and is the most common form of chronic cutaneous lupus erythematosus.[35] Clinically, the lesions start as discoid erythematous patches which then develop into plaques with follicular plugging and scaling. Eyelid findings include blepharitis, lid scarring, entropion, and ectropion. Scaly plaques on the eyelids with loss of hair follicles results in madarosis[60] [Figure 3]. Numerous studies have reported the mimicking of a chronic blepharitis by DLE.[35,61–63] A high index of suspicion is necessary in such cases, where the diagnosis is very often delayed by months to years.[35] Biopsy with histopathological examination should be done to confirm the diagnosis. Treatment with hydroxychloroquine results in a regrowth of the eyelashes.[61]
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