
یلــــــــــــدا :
Ill nervous habits harmful to health
There are very common nervous habits such as nail biting, biting the back of pencils, pulling hair, etc., which, though at first seem harmless, can become harmful.
1. Nail Biting
Nail biting is a bad habit constantly besides damaging the aesthetics of the fingers and hands and even cause injury to the skin near the nail, can be a source of bacteria. He explains Dr. Michael Shapiro, a dermatologist in New York:
Bacteria that are under the nails can also be transferred to the mouth, causing infections of the gums and throat
2. Biting pencils or pens
For some nail biting is not enough and continue with whatever even with pens or pencils. This leads to a lot of germs and bacteria in these objects being groped by many people, entering the mouth of one who bites, increasing the chances of contracting diseases such as colds, flu, etc.
3. Pulling hair out
This habit, although it is not as common as nail biting is common and many people who are in stressful situations hair pulling. This behavior taken to the extreme is calledtrichotillomania . It can in some cases damage to the scalp and root of the temporary or permanent loss of hair in those areas.
4. Sounding the neck
Many people have a habit of moving the neck sharply to the sides in order to release accumulated tensions in the area. This habit may seem harmless and initially produces relief eventually can cause strain on the neck ligaments. And the orthopedic surgeon Michael Gleiber notes that this practice could erode the joints and eventually result in arthritis.
5. Teeth grinding
The habit of grinding and clenching teeth at tense situations, stress anxiety, can lead to wear out or break any parts.
6. Touching your face
There are people who are nervous as usual when pinched face, especially when acne.This practice when it is constant, can damage the microscopic thin upper layers of the skin. Even in the most extreme cases it can hurt to the point of causing bleeding, which, according to Dr.. Jessica Krant, medical assistant professor of dermatology at SUNY Downstate Medical Center in New York, will be a permanent scar.
7. Biting lips
Biting or licking lips constantly can make digestive enzymes in the mouth damage the skin of the lips or cheilitis causing dermatitis, leading to dry and cracked look. And according to the New Jersey dermatologist Coyle S. Connolly, lip biting can lead to the appearance of fibroids, flesh-colored formations that may need to be surgically removed.
8. Biting the cheek
It is similar to lip biting and can lead to permanent swelling in the area, bleeding and scarring.
9. Chewing gum
Constantly chewing gum can lead to TMJ disorders due to excessive use of the jaw muscles. Also according to the National Institute of Digestive Diseases in the United States, air intake that occurs when chewing gum, promotes digestive gas.

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