“Allergies in children”的意思、由来-开放百科全书

词条

Allergies in children

释义

Signs and symptoms
Cause
Pathophysiology
Diagnosis
Prevention
Epidemiology
History
Medical specialty
Research
See also
References
External links
Bibliography
References

{{Infobox medical condition (new)
| name = Allergy
| synonyms = Allergic diseases
| image = Skin prick testing for allergies.jpg
| alt = Skin prick testing allergies
| caption = Hives are a common allergic symptom
| field = Allergy and immunology
| symptoms = Red eyes, itchy rash, runny nose, shortness of breath, swelling, sneezing
| complications =
| onset =
| duration =
| types = Hay fever, food allergies, atopic dermatitis, allergic asthma, anaphylaxis
| causes = Genetic and environmental factors
| risks =
| diagnosis = Based on symptoms, skin prick test
| differential = Food intolerances, food poisoning
| prevention = Repeated exposure to allergens, prophylactic respiratory medications
| treatment = Avoiding known allergens, medications, allergen immunotherapy
| medication = Steroids, antihistamines, epinephrine
| prognosis =
| frequency =
| deaths =
}}

Allergies in children are those causes, pathophsiology, treatments, management, practices and control of allergies that develop in children.^[1] ^[2] Up to 40 percent of children suffer from allergic rhinitis. And children are more likely to develop allergies if one or both parents have allergies.^[3] Allergies differ between adults and children. Part of the reason for this that the respiratory system in children is smaller. The bronchi and bronchioles are narrower so even a slight decrease in diameter of these airways can have serious consequences. In addition, children often 'outgrow' their allergies.

The incidence of childhood allergies has increased in the past 50 years.^[3]

Signs and symptoms

The signs and symptoms of allergies in a child are:

Chronic symptoms resembling the cold that last more than a week or two.^[1]^[4]
Cold-like symptoms that appear during the same time each year
Repeated difficulty breathing, wheezing and breathing
Cold-like symptoms that happen at night
Cold-like symptoms that happen during exercise
Chronic rashes or patches of skin that are dry, itchy, look like scales
Cold-like symptoms that appear after eating a certain food
Hives
Swelling of face, arms or legs
Gagging, coughing or wheezing, vomiting or significant abdominal pain
Itching or tingling sensations in the mouth, throat or ears^[1]

Cause

Each home contains possible allergens that can develop into allergies after exposure to:

Dust mites
Dogs and cats
Other furry pets
Cockroaches
Mice and rats)
Plants
Mold^[1]

Vitamin D deficiency at the time of birth and exposure to egg white, milk, peanut, walnut, soy, shrimp, cod fish, and wheat makes a child more susceptible to allergies.^[3] Soy-based infant formula is associated with allergies in infants.^[5]

Pathophysiology

A child's allergy is an immune system reaction. The child is reacting to a specific substance, or allergen. The immune system of a child responds to the invading allergen by releasing histamine and other chemicals that typically trigger symptoms in the nose, lungs, throat, sinuses, ears, eyes, skin, or stomach lining. In some children, allergies can also trigger symptoms of asthma—a disease that causes wheezing or difficulty breathing. If a child has allergies and asthma, controlling the allergies is important because the lack of treatment may make the allergies worse.^[4] Compounds such as phthalates are associated with asthma in children.^[6]^[7] Asthma in children is associated with exposure to indoor allergens.^[8] in early childhood may prevent the development of asthma, but exposure at an older age may provoke bronchoconstriction.^[9] Use of antibiotics in early life has been linked to the development of asthma.^[10] Exposure to indoor volatile organic compounds may be a trigger for asthma; formaldehyde exposure, for example, has a positive association.^[11]

Diagnosis

Testing is available to help identify any environmental or food allergies.^[1] Caregivers and clinicians can assess the child for the development of an allergy by noting the presence of signs and symptoms and history of exposure.^[1]

Prevention

Avoiding allergens will help prevent symptoms. Allergies that a child has to the family pet can be controlled by removing the animal and finding it a new home. Exterminating cockroaches, mice and rats and a thorough cleaning can reduce symptoms of an allergy in children. Dust mites are attracted to moisture. They consume human skin that has come off and lodged in, furniture, rugs, mattresses, box springs, and pillows. The child's bedding can be covered with allergen-proof covers. Laundering of the child's clothing, bed linens and blankets will also reduce exposure.^[1]

Exposure to allergens outside the home can be controlled with the use of air conditioners. Washing the hair, taking a bath or shower before bedtime can be done to remove allergens that have been picked up from outside the home. If grass or grass pollen is an allergen it is sometimes beneficial to remain indoors while grass is being cut or mowed. Children with allergies to grass can avoid playing in the grass to prevent allergic symptoms. Staying out of piled leaves in the fall can help. Pets returning into the home after being outdoors may track in allergens.^[1]

Epidemiology

Up to 5% of infants that are fed cow's milk-based formula will develop an allergy to cow's milk.{{sfn|Walker|page = 28}} Over half of cases in children in the United States occur in areas with air quality below EPA standards.^[12]

Bibliography

{{cite book | last = Walker | first = Marsha | title = Breastfeeding management for the clinician : using the evidence | publisher = Jones and Bartlett Publishers | location = Sudbury, Mass | year = 2011 | isbn = 9780763766511 }}

References

{{Reflist}}{{Respiratory pathology}}{{Respiratory physiology}}{{Allergic conditions}}{{Hypersensitivity and autoimmune diseases}}

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