How an erythema manifests itself - Dermatology and aesthetics


Dermatology and aesthetics

Dermatology and aesthetics


What is erythema How does an erythema Centrifugal annular erythema Frost erythema Pernial erythema Diaper erythema Infectious erythema Migrating necrolytic erythema Knotty erythema Fixed pigmented erythema Polymorphic erythema Syphilitic erythema Solar erythema
  • Meaning of erythema
  • How an erythema occurs
  • Centrifugal annular erythema
  • Frost erythema
  • Pernio erythema
  • Diaper rash
  • Infectious erythema
  • Migrant necrolytic erythema
  • Knotty erythema
  • Fixed pigmented erythema
  • Polymorphic erythema
  • Syphilitic erythema
  • Sunburn

How an erythema occurs

Numerous types of erythema have been identified: a first, general, classification is the one that distinguishes between active and passive erythema:

  • it is defined active when the greatest blood supply concerns the arterial vessels; this form of erythema is recognized by its bright red color and, sometimes, by the fact that, in that area, the skin feels warm to the touch;
  • he is defined passive when the veins are affected (with a stagnation of blood called venous stasis); this type of erythema is recognized by its bluish-red color and by the fact that the affected area is cold to the touch.

Another type of classification is based on the area affected by redness from erythema, which can be localized or generalized; in the latter case, three sub-categories are distinguished by appearance:

  • scarlet rash, with large vinous red skin areas, not separated by any range of healthy skin;
  • morbilliform erythema, with pinkish or reddish spots, irregular, interspersed with areas of healthy skin;
  • rose-like erythema, with pink specks, sometimes barely discernible.

Erythema can have several causes:

  • physical, in turn divided into mechanical (for example a prolonged rubbing) and thermal (from cold or heat);
  • chemical;
  • infectious (scarlet fever, measles, rubella, epidemic megaloeritema, syphilis, exanthema subitum);
  • emotional (sudden redness, localized to the face and neck, when embarrassing situations occur);
  • from taking medications;
  • from application of cosmetics and the like;
  • from vitamin imbalances (dysvitaminosis);
  • from diseases of the endocrine system;
  • from allergic reactions.

One of the most common rashes is sunburn, caused by an exaggerated exposure of the subject to the sun's rays.

Since erythema is the manifestation of a disease, the way it appears, its evolution and its treatment depend on it.

So let's consider some types of erythema in more detail.

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