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Nail-biting and thumb-sucking will keep children away from allergies

Nail-biting and thumb-sucking will keep children away from allergies

A study of 1,000 people at Dunedin Medical School in New Zealand, has shown that exposure to germs in childhood can increase protection of the organism, a benefit that extends even into adulthood. Among the most commonly used habits among children are nail biting and thumb sucking.

The study, completed by researchers at the Dunedin School of Medicine, New Zealand, and published in the scientific journal Pediatrics, was conducted with 1 thousand New Zealanders during their 5 and 32 years of age. The researchers found that one-third of the study participants sucked or nailed the nails at 5, 7, 9 and 11 years. Then the whole group was tested for allergies at age 13 and 32.

In the first test, it was found that the odds of developing allergic reactions to mites, animals, etc., had been reduced to 30% among young people who sucked their thumbs and gnawed nails in comparison to those who did not keep those habits. Years later, the second test pointed out that this protection followed the adulthood of the participants.

These habits, however, had no effect on the chances of developing asthma or rhinitis. If this is the case, here are some aggravating factors for respiratory allergies:

Temperature changes

Variations from heat to cold or vice versa may cause irritations to the respiratory system and other organs. "In the case of asthma, for example, this abrupt change irritates the bronchi, which contract as a response, which makes the person feel short of breath," explains pulmonologist Élcio Vianna, president of the Asthma Commission of the Paulista Society of Pneumology and Tisiology

Strong emotions

Being too nervous, sad or scared can trigger the closing of the bronchi, leading to an asthma attack. According to the pulmonologist Élcio, the exact reason for this effect is unknown. "What we do know is that the nervous system controls the bronchus, so that probably should be the relationship," he says.

Chemicals

There are some smelling products that cause irritation in most people, such as wall. "Even hair dye can trigger seizures," says Élcio Vianna.

Viral infections

Elcio Vianna says that every virus that irritates and inflames the bronchus causes it to close, which can increase the secretion and the chances of allergic attacks. Therefore, it is important to take the flu vaccine at the time of the campaign and be careful not to get low immunity and promote the manifestation of viral diseases.

See here other factors aggravating respiratory allergies and how to avoid them.


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