Plötzlicher Haarverlust? 6 mögliche Ursache

Sudden Hair Loss? 6 Possible Causes

by Pia Wolter on Jan 15 2026

Severe hair loss in women can have various causes, such as hormonal changes, stress, medication, diet, illness, or heredity.

In the following article, I would like to inform you about the different reasons for sudden hair loss and provide you with all the important information.

1. Possible Cause: Hormonal Changes

Hormonal changes can lead to sudden hair loss in women. Pregnancy, childbirth, menopause, polycystic ovary syndrome (PCOS), and thyroid problems are some of the possible hormonal changes that can cause hair loss.

During pregnancy, a woman's hormone levels can increase significantly, which can lead to improved hair growth. After birth, however, there can be a sudden drop in hormones, leading to hair loss. This is known as postpartum hair loss and usually occurs 2-3 months after birth.

During menopause, hormone production in the body decreases, which can lead to thinning hair. In addition, the production of male hormones usually increases. These, in turn, are responsible for hair loss. Scientifically, this is referred to as androgenetic alopecia, which can be translated as "hair loss due to male hormones."

PCOS is a hormonal disorder in which the body produces too many male hormones. This can lead to hair loss on the scalp and increased hair growth on the face and body. Thyroid problems can lead to hormonal changes that can cause hair loss.

2. Possible Cause: Stress

Stress can throw the body out of balance and lead to hair loss. When you are under stress, it can affect the hair roots and disrupt hair growth. Stress can also lead to a constriction of blood vessels in the scalp, which can impair the flow of nutrients to the hair follicles.

In some cases, stress itself may not be the direct cause of hair loss, but the effects of stress, such as unhealthy habits like poor diet, lack of sleep, and inadequate hygiene, can contribute to hair loss.

It is important to manage stress to prevent hair loss. This can be achieved through various methods such as regular exercise, relaxation techniques like meditation or yoga, sufficient sleep, a balanced diet, and avoiding bad habits like smoking. If hair loss is caused by stress, reducing stress and developing a positive attitude can help promote hair growth.

3. Possible Cause: Medication

In addition to various hormonal changes and stress, medication can be another trigger.

It is conceivable that some medications used to treat cancer, arthritis, depression, blood thinning, and blood pressure can have side effects that lead to hair loss.

Furthermore, it is also possible that hormonal contraceptives, such as the pill or hormone patches, can lead to hair loss. Hair loss usually occurs when the contraceptive method is changed or discontinued, for a period until the hormone level in the body normalizes.

4. Possible Cause: Diet

A poor diet can also lead to hair loss. An unbalanced diet can lead to your body not receiving enough nutrients that are important for hair growth and hair health.

Nutrients important for hair growth include proteins, vitamins, and minerals such as iron, zinc, and B vitamins. A deficiency in these nutrients can lead to hair loss.

To prevent hair loss due to dietary problems, you should consume a balanced diet with sufficient protein, vitamins, and minerals. The best food sources for these nutrients include:

  • Protein: Meat, fish, legumes, nuts, and seeds
  • Iron: Red meat, poultry, fish, beans, and green leafy vegetables
  • Zinc: Oysters, red meat, poultry, beans, and nuts
  • B Vitamins: Whole grains, meat, fish, dairy products, and green leafy vegetables

It is also important to drink enough water to keep the body hydrated and promote hair growth.

5. Possible Cause: Illness

Diffuse hair loss: Diffuse hair loss occurs when hair suddenly falls out due to stress, illness, or hormonal changes.

There are many diseases that can cause diffuse hair loss, including:

  • Thyroid disorders such as hyperthyroidism or hypothyroidism
  • Iron deficiency anemia
  • Autoimmune diseases such as lupus or Hashimoto's thyroiditis
  • Fungal infections of the scalp
  • Diabetes
  • Infections or fever

It is important to treat the underlying disease to stop hair loss and promote hair growth. In some cases, hair loss may be temporary and recover once the underlying disease has been treated.

Alopecia areata is an autoimmune disease in which the immune system mistakenly attacks hair follicles, leading to hair loss. The cause of alopecia areata is unknown, but it is believed to be a combination of genetics and environmental factors.

Alopecia areata usually occurs in children and young adults and can appear in various forms. Symptoms include round, bald patches on the scalp or other hairy areas of the body. Unfortunately, there is no cure, but there are different treatment options.

6. Possible Cause: Heredity

Genetically determined hair loss is also possible. The predisposition for hair loss can be passed from parents to children. This type of hair loss is called androgenetic alopecia and is the most common form of hair loss in women and men.

Androgenetic alopecia occurs when the male hormone dihydrotestosterone (DHT) damages hair follicles and impairs hair growth. Women usually have less DHT than men, but women with a genetic predisposition to alopecia can still be affected.

Alopecia can occur in women at any age but can also begin later in life. Symptoms include gradual thinning of the hair, especially in the area of the part and crown of the head.

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I hope this article was helpful to you. If you have any further questions, feel free to leave a comment!

Best regards, your Pia ♥️