Anemia is defined as the pathological condition in which the total mass of red blood cells is less than normal.

The main cause of anemia is iron deficiency.

Apart from the general effects that the above condition has on the health, good image and well-being of the body, it is considered as one of the important causes that lead to hair loss.

It is typical that a large percentage of women who visit hair clinics are anemic to some extent.

For this reason, in cases of hair loss, the examination for possible anemia is one of the first to be recommended.

• Diabetes can affect the hair in more than one different ways leading to hair loss.

  The possible destruction of the blood vessels leads to insufficient nutrition of the hair follicles due to the lack of oxygen, which can affect the normal hair growth cycle.

  In addition, diabetes appears to increase the chances of developing alopecia areata, an autoimmune disease in which the immune system attacks hair follicles.

  Finally, the stress that often accompanies such chronic diseases is considered to be possible to aggravate hair loss.

Both hyperthyroidism and hypothyroidism can lead to hair loss.

After all, hair loss is a sign that your thyroid hormones are out of balance.

In most cases the effect is reversible by taking medication to treat the disorder

In rare cases, however, it is possible that hair loss occurs after starting treatment.

In these situations it is not easy to clarify whether the hair loss comes as a result of the previous condition or due to taking medication.

In most cases thyroid disorders have autoimmune causes.

This fact increases the chances of developing other autoimmune diseases related to hair such as alopecia areata or lupus erythematosus.

This is a fungal infection that does not necessarily occur only in the skull, on the contrary, it can develop in any part of the body.

The fungus enters the hair fibers making them brittle and creating areas of thinning which expand outwards.

A red tint is observed on the outside of the above areas, with the inside maintaining a more normal color.

The infection is spread through skin-to-skin contact and also develops in pets – especially cats, from which it can be transmitted.

Hair loss is one of the symptoms of the systemic form of the autoimmune disease lupus erythematosus.

In its discoid form, in which it affects the skin, it is the second most frequent cause of scarring alopecia.

High fever in some cases can lead to hair loss. This is because during traumatic events for the body – and high fever can be considered as one of them, it has been shown to lead to hormonal imbalance which in turn affects hair follicles.

In such a case it is possible that the hairs stop growing resulting in hair loss within 2 to 3 weeks of the fever incident.

Cancer-related hair loss is primarily associated with cancer treatments.

Hair loss in cases of chemotherapy or radiation comes from the cessation of hair growth that is in the anagen phase of the growth cycle.

In the case of chemotherapy, the effect concerns about 90% of the hair.

For the most part, however, hair growth comes back after this, as unlike cancerous cells, normal cells recover.

In the case of radiation therapy, the loss is located locally in the area of action of the rays.

The result is reversible for low-frequency radiation with changes however in relation to the quality of the hair.

In some cases, however, hair growth may not return.

While hair loss does not generally appear to be associated with an increased risk of cancer, men with androgenetic alopecia seem to have a 40% greater risk of developing prostate cancer. This is likely explained by the fact that the hormone DHT is associated with both conditions.

However, the risk of developing non-aggressive prostate cancer does not seem to be increased in patients with androgenetic alopecia.

One of the symptoms of syphilis in the second stage is hair loss, which occurs in 4% of patients.

The lesions are mainly located in the parietal occipital region and consist of multiple and irregular patches of alopecia which do not have a scarring form and present a characteristic appearance.

Hair loss can come either as a result of the disease if it affects the scalp, or as a side effect of the treatment that the patient will follow.