| 释义 |
hives
hives H0222700 (hīvz)pl.n. (used with a sing. or pl. verb) A rash characterized by intensely itching welts, triggered by the release of histamine and caused by an allergic response to any of multiple agents or conditions, including food, drugs, and infections. Also called nettle rash, urticaria.
[Origin unknown.]hives (haɪvz) n (Pathology) (functioning as singular or plural) pathol a nontechnical name for urticaria[C16: of uncertain origin]hives (haɪvz)
n. (used with a sing. or pl. v.) a transient eruption of large, itchy wheals on the skin usu. caused by an allergic reaction; urticaria. [1490–1500; orig. Scots; of obscure orig.] hives (hīvz) Itchy welts on the skin that are redder or paler than the surrounding skin. Hives may result from an allergic reaction, but often the cause is unknown.hivesA skin condition, also known as urticaria, characterized by raised swellings that itch and burn. It is caused by allergies and sometimes injury or cold.Thesaurus| Noun | 1. |  hives - an itchy skin eruption characterized by weals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugsnettle rash, urticaria, urticationrash, roseola, skin rash, efflorescence - any red eruption of the skinhypersensitivity reaction - an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock |
Translationshives
a hive of activityA bustling or busy place. On Fridays, the school is only a hive of activity until 3:00 PM—then, everyone rushes out to start their weekend.See also: activity, hive, ofhive offTo separate someone or something from someone or something else. A noun or pronoun can be used between "hive" and "off." I think we need to hive this group off into another homeroom—there's just too many kids in here.See also: hive, offhive offv. To set something apart from a group: The CEO hived off the department into another division. The police academy hived the new recruits off during orientation.See also: hive, offhives
hives (urticaria), rash consisting of blotches or localized swellings (wheals) of the skin, caused by an allergic reaction (see allergyallergy,
hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g.
..... Click the link for more information. ). The swelling is caused by distention of the skin capillaries and escape of serum and white cells into the skin and tissues. Hives are usually extremely itchy, and they may occur in a small area or cover virtually the entire body. The allergic reaction is commonly to a food or a drug, although injections of serum, insect bites, inhalants (pollen), and physical factors (cold, light, heat) may also be causative. Usually crops of hives come and go, remaining at one site for several hours and then reappearing at another; commonly an acute attack subsides spontaneously in a week or two. However, chronic cases of hives may last for long periods of time. Antihistamines and cortisone are considered helpful in relieving the itching and reducing the swelling.hives[hīvz] (medicine) urticaria hives
Hives DefinitionHives is an allergic skin reaction causing localized redness, swelling, and itching.DescriptionHives is a reaction of the body's immune system that causes areas of the skin to swell, itch, and become reddened (wheals). When the reaction is limited to small areas of the skin, it is called "urticaria." Involvement of larger areas, such as whole sections of a limb, is called "angioedema."Causes and symptomsCausesHives is an allergic reaction. The body's immune system is normally responsible for protection from foreign invaders. When it becomes sensitized to normally harmless substances, the resulting reaction is called an allergy. An attack of hives is set off when such a substance, called an allergen, is ingested, inhaled, or otherwise contacted. It interacts with immune cells called mast cells, which reside in the skin, airways, and digestive system. When mast cells encounter an allergen, they release histamine and other chemicals, both locally and into the bloodstream. These chemicals cause blood vessels to become more porous, allowing fluid to accumulate in tissue and leading to the swollen and reddish appearance of hives. Some of the chemicals released sensitize pain nerve endings, causing the affected area to become itchy and sensitive.A wide variety of substances may cause hives in sensitive people, including foods, drugs, and insect bites or stings. Common culprits include:- nuts, especially peanuts, walnuts, and Brazil nuts
- fish, mollusks, and shellfish
- eggs
- wheat
- milk
- strawberries
- food additives and preservatives
- penicillin or other antibiotics
- flu vaccines
- tetanus toxoid vaccine
- gamma globulin
- bee, wasp, and hornet stings
- bites of mosquitoes, fleas, and scabies
SymptomsUrticaria is characterized by redness, swelling, and itching of small areas of the skin. These patches usually grow and recede in less than a day, but may be replaced by hives in other locations. Angioedema is characterized by more diffuse swelling. Swelling of the airways may cause wheezing and respiratory distress. In severe cases, airway obstruction may occur.DiagnosisHives are easily diagnosed by visual inspection. The cause of hives is usually apparent, but may require a careful medical history in some cases.TreatmentMild cases of hives are treated with antihistamines, such as diphenhydramine (Benadryl) or desloratadine (Clarinex). Clarinex is non-sedating, meaning it will not make patients drowsy. More severe cases may require oral corticosteroids, such as prednisone. Topical corticosteroids are not effective. Airway swelling may require emergency injection of epinephrine (adrenaline).Alternative treatmentAn alternative practitioner will try to determine what allergic substance is causing the reaction and help the patient eliminate or minimize its effects. To deal with the symptoms of hives, an oatmeal bath may help to relieve itching. Chickweed (Stellaria media), applied as a poultice (crushed or chopped herbs applied directly to the skin) or added to bath water, may also help relieve itching. Several homeopathic remedies, including Urtica urens and Apis (Apis mellifica), may help relieve the itch, redness, or swelling associated with hives.PrognosisMost cases of hives clear up within one to seven days without treatment, providing the cause (allergen) is found and avoided.PreventionPreventing hives depends on avoiding the allergen causing them. Analysis of new items in the diet or new drugs taken may reveal the likely source of the reaction. Chronic hives may be aggravated by stress, caffeine, alcohol, or tobacco; avoiding these may reduce the frequency of reactions.Key termsAllergen — A substance capable of producing an immediate type of hypersensitivity, or allergy.Wheal — A smooth, slightly elevated area on the body surface, which is redder or paler than the surrounding skin.ResourcesPeriodicalsKirn, F. Timothy. "Desloratadine Improves Urticaria in Clinical Setting." Skin & Allergy News September 2004: 41.urticaria [ur″tĭ-ka´re-ah] a vascular reaction of the skin marked by transient appearance of slightly elevated patches (wheals) that are redder or paler than the surrounding skin and often attended by severe itching; the cause may be certain foods, infection, or emotional stress. (See Atlas 2, Plate D.) Called also hives. adj., adj urtica´rial.cold urticaria urticaria precipitated by cold air, water, or objects, occurring in two forms: In the autosomal dominant form, which is associated with fever, arthralgias, and leukocytosis, the lesions occur as erythematous, burning papules and macules. The more common acquired form is usually idiopathic and self-limited.giant urticaria angioedema.urticaria hemorrha´gica purpura with urticaria.urticaria medicamento´sa that due to use of a drug.papular urticaria (urticaria papulo´sa) an allergic reaction to the bite of various insects, with appearance of lesions that evolve into inflammatory, increasingly hard, red or brownish, persistent papules.urticaria pigmento´sa the most common form of mastocytosis, occurring primarily in children, manifested as persistent pink to brown macules or soft plaques of various size; pruritus and urtication occur on stroking the lesions.urticaria pigmentosa, juvenile urticaria pigmentosa present at birth or in the first few weeks of life, usually disappearing before puberty, taking the form of a single nodule or tumor or of a disseminated eruption of yellowish brown to yellowish red macules, plaques, or bullae.solar urticaria a rare form produced by exposure to sunlight.ur·ti·car·i·a (ŭr'ti-kar'i-ă), An eruption of itching wheals, collquially called hives, usually of systemic origin; it may be due to a state of hypersensitivity to foods or drugs, foci of infection, physical agents (heat, cold, light, friction), or psychic stimuli. Synonym(s): hives (1) , urtication (2) [L. urtica] hives (hīvz)pl.n. (used with a sing. or pl. verb) A rash characterized by intensely itching welts, triggered by the release of histamine and caused by an allergic response to any of multiple agents or conditions, including food, drugs, and infections. Also called nettle rash, urticaria.urticaria A condition characterised by pruritic, raised red welts on the skin (dermographism), associated with allergic reactions and histamine release or defects in the complement or kinin systems.
Risk factors
Prior allergic reactions—e.g., hay fever and angioedema.
Urticaria triggers
- Animal dander (especially cats)
- Drugs/medication
- Emotional stress
- Food (e.g., berries, shellfish, fish, nuts, eggs, milk)
- Immune—hereditary angiooedema
- Infection—echinococcus infection (dog tapeworm)
- Inflammation (e.g., mononucleosis, hepatitis)
- Insect bites
- Mastocytosis
- Mechanical stimulants (e.g., water, sunlight, cold or heat)
- Pollen
- Post-infection
- Other disease
• Autoimmune diseases, systemic lupus erythematosus
• Henoch-Schönlein purpura
• Leukaemia, etc.hives Urticaria, see there. ur·ti·car·i·a (ŭr'ti-kar'ē-ă) An eruption of itching wheals, usually of systemic origin; it may be due to a state of hypersensitivity to foods or drugs, foci of infection, physical agents (e.g., exercise, heat, cold, light, friction), or psychic stimuli.
Synonym(s): hives (1) , urtication (3) . [L. urtica]
wheal (wēl) A circumscribed, evanescent papule or irregular plaque of edema of the skin, appearing as an urticarial lesion, slightly reddened, often changing in size and shape and extending to adjacent areas, and usually accompanied by intense itching; produced by intradermal injection or test, or by exposure to allergenic substances in those susceptible.
Synonym(s): hives (2) , welt. [A.S. hwēle]ur·ti·car·i·a (ŭr'ti-kar'ē-ă) An eruption of itching wheals, colloquially called hives, usually of systemic origin; may be due to a state of hypersensitivity to foods or drugs, foci of infection, physical agents (heat, cold, light, friction), or psychic stimuli. [L. urtica]
wheal (wēl) Circumscribed, evanescent papule or irregular plaque or dermal edema, appearing as an urticarial lesion, slightly reddened, often changing in size and shape and extending to adjacent areas, and usually accompanied by intense itching; produced by intradermal injection or test, or by exposure to allergenic substances in susceptible people. [A.S. hwēle]Patient discussion about hivesQ. What caused my hives? I woke up this morning and saw that all my back and chest are covered in hives. How did this suddenly appear? What caused it?A. Urticaria (hives) is generally an allergic reaction, or an immune response to food or some other allergen, but can also appear for other reasons, notably emotional stress. Q. I was diagnosed with chronic urticaria. What is the reason for this condition? I was diagnosed with chronic urticaria last week after more than two months of urticaria (I have more than twenty 1 dollar coin area no my trunk that are red swollen and itchy). when I was younger I had a similar reaction too a bee sting and I was treated with an adrenalin shoot. Since that one time I never suffered from this kind of symptoms till two months ago.What can be the reason for this condition?A. As was said before chronic urticaria is a symptom of many problems. I once took NSAIDs for knee pain and I started to itch myself. It took my doctor 3 weeks to understand that I was allergic to this specific drug. I also know that tomatoes can cause me an allergic reaction. Try to think is there anything new in your life? Tell it to the GP maybe he will be able to tell you if this is the reason for your symptoms. Q. hpv Can i get pregnantA. You can get pregnant you just need to tell your doctor whats going on so he can keep an eye on the issue.
http://yourstdhelp.com/hpv.html More discussions about hivesHIVES
| Acronym | Definition |
|---|
| HIVES➣High Volume Electrostatic Sampler |
hives
Synonyms for hivesnoun an itchy skin eruption characterized by weals with pale interiors and well-defined red marginsSynonyms- nettle rash
- urticaria
- urtication
Related Words- rash
- roseola
- skin rash
- efflorescence
- hypersensitivity reaction
|