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Skin diseases

Skin diseases (dermatoses) are diseases that primarily affect the skin itself. But they can also affect the sebum and sweat glands, hair or nails.

The skin reacts to external stimuli, such as pathogens, cold, heat, rays, poisons or drugs. But internal processes such as hormonal changes or an autoimmune disease can also cause skin changes. These are mostly visible to the naked eye.

The right contact person for skin diseases is the dermatologist (dermatologist) . On this page you will find out everything you need to know about the most common skin diseases and how to recognize them.

Recognize skin diseases

Skin changes occur in many skin diseases. They can appear individually or together affect a larger area of ​​skin. Also  patchy skin lesions  (lesions) occur.

Typical signs of a skin condition include:

  • Wheals
  • Papules
  • Nodules
  • Pus pustules
  • Vesicles

In the further course, the skin can flake off or turn into crusts, crusts and scars. Acute and chronic skin diseases are often accompanied by severe itching . In addition, various tumors can develop on the skin.

Skin changes can occur on the face, body or hairy scalp. How to recognize the most common skin changes can be seen in the following picture gallery:

Common skin diseases

Neurodermatitis, shingles, athlete’s foot: the list of skin diseases is long. Almost everyone comes across an unpleasant skin change in the course of their life . Depending on where it occurs and what it looks like, you can identify the cause.

Also, allergic reactions  can change the skin. You can find more information about this on the Allergy overview page.

You can learn more about the most common skin diseases in the following sections:


Everyone has impure skin. But between 70 and 80 percent of teenagers suffer from acne. This makes acne the most common skin disease worldwide. The sebum glands become inflamedand purulent pustules, pimples and blackheads develop.

The reason for the skin changes is usually the hormonal change during puberty. Acne can occur on the face, back, or in folds of the body such as the armpit. Depending on how pronounced the pustules and pimples are, the skin disease can leave scars and be very stressful for those affected.


Neurodermatitis, also called atopic dermatitis or atopic eczema, is a widespread, chronic skin disease . The itchy rash is not contagious .

The inflammatory skin changes usually occur in childhood  . More than every tenth child in Germany has had atopic eczema at least once in their life. But adults can also suffer from neurodermatitis says the best skin doctor in west delhi.

Over the years the symptoms improve in many patients – in some the symptoms even disappear completely


Psoriasis is an inflammatory skin disease . Red, itchy, scaly skin changes are typical of psoriasis. The chronic disease progresses in flares and is not contagious. So far there is no cure.

About two percent of Germans suffer from psoriasis. The skin disease usually begins in adolescence or young adulthood (type 1). But psoriasis can also appear for the first time between the ages of 50 and 70 (type 2).

Psoriasis can basically affect all parts of the body . But it usually shows up on the knees, elbows, rump or on the palms of the hands and feet. In some cases, psoriasis occurs on the face, on the hairy scalp or on the nails. Apart from that, the disease can also affect the joints.

Skin cancer

A distinction is made primarily between black and white skin cancer. But there are other skin cancers as well. For example, skin cancer of the lymph glands, sarcomas or Paget’s disease. Other cancers in the body can also show up on the skin.

Black skin cancer  typically looks like an irregular or misshapen, dark spot. The color, size and shape of the stain will change over time. Apart from the changes in the skin, skin cancer does not cause any symptoms at first. More than 250,000 people worldwide develop black skin cancer every year.

Basal cell carcinoma and squamous cell carcinoma are behind the term white skin cancer . White skin cancer can look different. The skin is flaky, uneven, or the skin color changes. Every year around two to three million people worldwide develop light skin cancer.


Herpes diseases are infectious diseases caused by viruses . Once infected, the virus will remain in the body for a lifetime. There are several herpes viruses that can affect humans. That is why they are also called human herpes viruses (HHV):

  • HHV-1 = herpes simplex virus 1
  • HHV-2 = herpes simplex virus 2
  • HHV-3 = varicella zoster virus (chickenpox, shingles)
  • HHV-4 = Epstein-Barr virus ( Pfeiffer’s glandular fever )
  • HHV-5 = cytomegaly virus  (CMV)
  • HHV-6 and HHV-7 (three-day fever)
  • HHV-8 = Kaposi’s sarcoma virus

The individual types of viruses usually cause different diseases and different complaints. The skin and mucous membranes are mainly attacked by the herpes simplex viruses. The three-day fever also manifests itself as a typical rash. Read more about herpes diseases:


Warts are benign skin growths caused by viruses . That means they’re contagious.  They can appear on different parts of the body and usually go away on their own after a few weeks or months.

The typical skin warts, medically called Verrucae vulgares, are caused by an infection with certain human papillomaviruses (HPV) . Almost everyone will have a wart at some point in their life. The skin changes occur particularly frequently in children and adolescents.

Skin diseases on the face

Unfortunately, the face is not spared from skin diseases either. Once infected with the herpes virus, cold sores can occur again and again . Also, shingles can occur on the face – this is usually very distressing for those affected.

The skin disease rosacea only affects the face: the skin is very red and painful blisters form.

Here you can find out everything you need to know about skin diseases on the face:

Infectious skin diseases

Some skin diseases are contagious . Transmission occurs through physical contact with other people, via the finest droplets from the breath or during unprotected sexual intercourse . You get more information on the side of STDs .

Children, the elderly and people with a weak immune system are particularly at risk of infection. For example, an HIV disease or the use of certain medication weaken the immune system.

Here you can find out which skin diseases can be transmitted and how you can protect yourself from infection.


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