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 DENOMINATION
- hives,
- hives colinérgica,
- dermografismo,
- artificial hives,
- hives to frigore.
DEFINITION
The hives is the injuries appearance in the skin with eritema (red color), formation of habones (elevation of the palest skin), and itch that can appear locally or of form generalized by the whole body. The hives which causal factor there are the physical stimuli, heat, cold, plastered, pressure, etc... are the group that is named like physical hives. There constitute a most of the chronic hives of well-known cause.
SPECIAL CHARACTERISTICS
- They are clinically quantifiable ó measurable, since the stimuli that the son provoke also to reproduce them in the diagnosis.
- They are usually immediate (I initiate in a few minutes) and brief (after one hour they are accustomed to disappearing). As exception we have the hives slowed down by pressure.
- In most of the occasions they are located in the place of the stimulus.
- They are usually reproducibles clinically with test of provocation well definite, which facilitates his diagnosis and control.
- They are accustomed to affecting the young adults, with certain preference to the feminine sex.
- They are evident without factors desencadenantes clear and are accustomed to resolving themselves spontaneously in the course of time, except in the familiar forms (very rare).
- His etiology ó cause is not known, although some associations exist to other illnesses. There does not exist a major incidence of familiar or personal atopia. Someone have a genetic or familiar base, most of transmission autosómica domineering.
- They collaborate between them with certain frequency, and also with other types of hives.
- The angioedema can appear in the hives by the cold, by pressure, vibratory and more rarely, in the colinérgica.
- With light stimuli they present light clinic: itching or eritema isolated.
CLASSIFICATION
| Type |
Relative frequency
(%) |
Beginning middle age
(years) |
Average duration
(years) |
Mechanism
desencadenante |
Time
of beginning |
Duration of
the injuries |
| Artificial (slowed down) |
50 |
25 |
6,5 |
Rubbing |
2-5 min |
1-3 hours
(1/2-8 hours) |
| Colinérgica |
30 |
25 |
5,3 |
Exercise,
Increase of the heat |
2-20 min |
30-60 min |
| For cold |
15 |
18 |
4,2 |
I contact with
the cold |
2-5 min |
1-2 hours |
| Lot |
3 |
28 |
7,1 |
Light |
2-15 min |
15 min-3 hours |
| For pressure |
2 |
34 |
6 |
Pressure |
3-8 hours |
8-24 hours |
| For heat |
rare |
37 |
1 |
Heat (contact) |
2-15 min |
30-60 min |
| Acuagénica |
rare |
18 |
? |
Water |
2-30 min |
30-60 min |
| Vibratory Angioedema |
rare |
? |
? |
Vibration |
0,5-4 min |
48 hours |
Induced Anafilaxia
for the exercise |
rare |
24 |
5 |
Exercise |
2-5 min |
10-30 min |
| For cold |
rare |
Infancy |
Of for life |
Cold air |
0,5-3 hours |
48 hours |
TREATMENT OF THE PHYSICAL HIVES
In general the mechanisms must be avoided desencadenantes.
As medicines treatment there are used the antihistamines of the second generation (Cetirizina. Loratadina. Ebastina. Mizolastina. Fexofenadina), if it does not improve it resorts to those of the first generation like the hidroxicina, or an effect antidepressant in the hives as it is the doxepin. The pressure hives only answers to the corticoids.
WHAT DOCTOR CAN TREAT ME?
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DENOMINATION 
