My Symptoms

Dry skin: the causes

Dry skin is the result of insufficient production of fat by the sebaceous glands in the skin and a dysfunction of water regulation. The causes can be multiple, for example:

  • Hereditary predisposition,
  • Age,
  • Insufficient weight,
  • Dry air heating, air conditioning,
  • Humidity or air temperature,
  • Soaps and shower gels,
  • Cleaning lotions,
  • perfumes,
  • Drugs (such as diuretics),
  • Means of hormonal contraception,
  • Radiation.

Insufficient nutrition or malnutrition, as well as the consumption of alcohol and tobacco can also cause dry skin.

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Poorly vascularized body areas that are largely free of sebaceous glands (eg, lower legs) are at particular risk of developing dry skin.

Especially in winter, many people suffer from dry skin. The cold air and the low humidity of the outside air associated with the hot and dry air of the heating inside, put the skin to the test and dry it.

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The skin tends to be drier with age, which can be explained by different causes. The following mechanisms promote, among other things, the appearance of dry skin at age:

  • The production of sebum naturally decreases with age.
  • The epidermis loses its ability to retain moisture.
  • The sweat glands secrete less sweat.


Besides these physiological reasons, different diseases can cause dry skin, for example :

  • atopic dermatitis,
  • psoriasis,
  • eczema,
  • diabetes,
  • hypothyroidism (insufficient production of hormones by the thyroid),
  • certain intestinal diseases (for example, Crohn's disease, ulcerative colitis and inflammation of the small intestine),
  • gastritis,
  • Zollinger-Ellison syndrome (characterized by the presence of gastrointestinal ulcers),
  • certain allergies (eg, food or laundry products), etc.

17 Skin Info

Our skin is not just the outer skin of our body, it is a complex and versatile fabric. For you, we have gathered the most important information to know about the skin.

17 Skin Info

The skin is a very important tissue of the human body. If it were spread on the ground, it would cover an area of 1.5 to 2 m² (in adults).

17 Skin Info

The skin represents about 15 to 20% of our body weight. For a person who weighs 75 kg, this amounts to a weight of almost 14 kg.

17 Skin Info

The skin has on average 6 million cells, 15 sebaceous glands and 100 sweat glands per cm².

17 Skin Info

The skin is responsible for our unique appearance and performs multiple functions . It protects us for example cold, heat or chemicals, ...

17 Skin Info

. she perceives contacts , pains and temperatures .

17 Skin Info

. and it ensures that the body does not lose too much liquid . At the same time, the skin allows a well-dosed liquid loss to cool off from the outside when necessary.

17 Skin Info

In total, the skin includes 3 layers in total: epidermis, dermis and hypodermis . Each layer has very different functions.

17 Skin Info

The upper layer, the epidermis, protects us mainly from heat, cold and chemicals . It is covered with very many bacteria that live on the surface of the epidermis.

17 Skin Info

The epidermis is particularly thick on the hands and feet where its diameter can reach up to 2 mm . The average thickness of the epidermis is 0.05 mm.

17 Skin Info

The cells of the epidermis multiply at such a speed that the complete epidermis is completely renewed in the space of only one month . The body loses each day between 10 and 15 grams of dead cells.

17 Skin Info

Below the epidermis is the dermis : it consists of a very dense network of collagen fibers that give the skin its elasticity and deformability, as well as its resistance to tearing .

17 Skin Info

In the dermis are blood and lymphatic vessels, nerves, cells of the immune system, hair roots, multiple skin glands and pressure receptors (for the sense of touch).

17 Skin Info

When it is cold, the small blood vessels of the dermis "tighten", when it is hot they widen. This also has an impact on the color of the skin .

17 Skin Info

The layer below the dermis, the hypodermis, consists mainly of fat and connective tissue. The grease serves as a reservoir of energy and thermal insulator .

17 Skin Info

The hypodermis allows the mobility of the skin and connects it to the underlying structures.

17 Skin Info

On the hands and especially the feet, the fat of the hypodermis also serves as a " mattress " to protect the bones and tendons that it covers.

You want to react, to give your testimony or to ask a question? Appointment in our FORUMS Skin Care or A doctor answers you!

Read also :

> Acne: How to get rid?
> Mili kernels these little white dots on the face ...
> Test on your skin: discover your skin type!
> Rash: What disease is behind the symptom?
> 5 foods to favor and avoid to have a beautiful skin

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