There are many dermatological diseases that are easily confused with allergic manifestations. Because of this, it becomes difficult to differentiate the immune response of the body to irritants and, for example, infection with a viral, fungal infection. To be able to distinguish them, it is important to know exactly what an allergic rash looks like, all its characteristic features, to recognize the additional symptoms of the immune response.
What does an allergic skin rash look like?
Frequently considered rashes appear on the face, neck. As a rule, they arise against the background of the use of unsuitable cosmetic and hygienic products, perfumes. Distinctive features of such a rash:
- red small spots;
- itching;
- presence of pigmented areas;
- peeling.
Such symptoms usually disappear after discontinuing use of the stimulus, applying anti-inflammatory and hormonal drugs.
As for the rashes on the body, there are only 3 of their varieties:
- dermatitis;
- eczema;
- urticaria .
Let us consider each of them in detail.
How does the dermatitis allergic rash look like in adults?
This type of rash appears almost immediately after contact with irritants. It is characterized by the presence of red or pink round spots of small diameter, small non-inflamed pimples, scaly areas of the epidermis.
As a rule, dermatitis occurs on the skin of the upper and lower extremities, on the neck, face and trunk it is observed extremely rarely.
Patient Complaints:
- itching;
- swelling of affected areas;
- sometimes - a local increase in temperature.
Allergic rash on the body in an adult, complicated by eczema
This form of pathology is the most difficult to treat.
Eczema is characterized by the following symptoms:
- large pink or light red spots all over the body;
- alternation of dry and wet surfaces;
- skin ulceration;
- uneven rims;
- fusion of spots;
- severe periodic itching;
- cracking of the affected epidermis with the formation of rather deep wounds.
Severe urticaria or an allergic rash all over the body
Like dermatitis, the described type of rash is observed almost immediately after contact with the allergen.
Hives occur more often, so it is easier to diagnose. In addition, this type of rash has very specific features:
- the appearance of large blisters filled with fluid;
- intense itching;
- redness of the skin;
- gradual fusion of rashes forming large plaques with clear, even contours.