Hair loss occurring a few days to weeks after the trigger event. One example is taking medication, or also especially radiation therapy and chemotherapy. The hair follicles become damaged, leading the hair to fall out. Often, the affected person may lose their hair completely. However, the growth process can be "restored" and the hair can grow again, Due to the length of the growth phase, though, it can take a while for your former luscious hair to be visible again.

This is where the hair that is in its resting phase falls out. This usually lasts three months, during which time combing and brushing causes the hair to fall out. This is a completely natural process. Specific triggers, such as stress or a fever, can lead to an increased level of hair loss. However, it is delayed and not immediate.

With this type of hair loss, the hair follicles have a hypersensitive reaction to the hormone DHT (dihydrotestosterone, a metabolite of testosterone). This leads to follicle shrinkage and degeneration, with only vellus hair forming in its wake (if at all). 

During menopause, women have to contend with numerous health issues. Hair loss may be one of them. Major hormonal changes cause estrogen levels to decrease and the levels of male hormones to increase, resulting in thinner hair and hair loss. This leads to additional mental strain for women experiencing menopause. As mentioned in the introduction, hair is extremely important for every person. This hair cannot be expected to "grow back”. 

During pregnancy too, the condition of your hair or its growth will change. Due to the increase in your estrogen level, more hairs than usual will enter the growth phase, resulting in hair that is thicker than normal. However, this is reversed after birth and the temporarily thicker hair thins out again. In most cases, the hair loss is really only temporary. A similar phenomenon occurs after women stop taking the pill. In this situation too, the hair count changes.

Hey men, how often do you compare your old pictures with what you currently see in the mirror, gently run your hand over your temples and sigh at the sight of your ever dwindling hair? We are talking about a receding hairline here, which hurts, there is no doubt. After all, who wants to put up with seeing more scalp than hair, especially on the sides? Unfortunately, this form of hair loss is one of the forms where you can’t hope for spontaneous recovery. No hair will grow again here in the future unless you decide to have a hair transplant. It is not uncommon for the end result to be a bald head.

No, we don't see this as the ultimate protection against hair loss. This form is not caused by illness; it is hereditary. The age at which this happens is unpredictable. It affects some men in their 30s, others in their 50s, or even only in old age. Men with this hormonal type of hair loss can virtually experience the opposite effect if, for example, they undergo hormonal treatment for prostate cancer. In this case, the hair loss is stopped or does not occur at all. This is another example of the influence that hormones can have.

This hair loss disorder results in circular bare patches entirely free of hair on the scalp after an initial period of burning and itching. This affects both men and women, and can appear suddenly, even in young adults. In Germany, it affects more than 1 million people. It cannot be cured, or rather there is no proven cure. However, a spontaneous recovery can occur. The problem usually persists for an extended period of time. Even after it goes away, there is still always a chance of new, further phases of this circular hair loss. Nothing much is known about the exact causes of alopecia areata, however, researchers suspect it might be related to autoimmune diseases. Some affected people also suffer from other autoimmune diseases (neurodermitis, vitiligo/white spot disease).

Loss of all head and body hair

Hair falls out over the entire head area, including eyelashes and eyebrows.

In contrast to the almost structured retreat of hair with androgenetic alopecia, hair loss is fairly uniform in the diffuse variant. Diffuse hair loss can occur due to several reasons. These include medication, hormones, fever, and thyroid diseases.

The hair breaks down in certain areas and the hair follicles are damaged or destroyed, creating small scars. The damage appears to be the result of inflammation, which can be caused by various factors, such as bacteria, fungus, or environmental influences. 

Traction alopecia is also in this category of alopecia and is one of the self-inflicted causes of hair loss. Hairstyles can trigger this, among other things. If ponytails, buns, braids, extensions, and so on, are tied too tight or are too heavy for the hair roots to support, damage can occur over time to these specific hair roots. Constantly wearing caps, hats, and dreadlocks also poses risks. The cause is therefore purely mechanical in nature, and cannot be attributed to any medical condition.

Hair falls out due to deliberate pulling or plucking. Psychological factors, such as stress, anxiety, depression are the cause here, and need to be addressed with a specialist.

This psychological illness is a type of obsessive-compulsive disorder. Young women are especially susceptible to this disorder, which consists of swallowing and eating one's own hair. If this occurs over a longer period, this can lead to significant health issues. In the most severe cases, it can result in death. Hair is unable to be digested by the human body and accumulates in the stomach. An operation to remove it may therefore prove necessary. In any case, it is advisable to seek medical and psychological help with this disorder.