The strong urge to smoke at any time,

- Emergence of anxiety, nervousness, depressed mood in case of lack.

Studies have shown that there is no threshold level below which tobacco is not harmful to health because few cigarettes a day is enough to cause disease:

- One in three cancer is caused by smoking. The most common are the cancer of bronchus and lung, throat cancer, cancer of the larynx. Others are more rare but serious as cancer of the kidneys or bladder.

- Smoking is also part of risk factors cardiovascular responsible for the occurrence of heart attacks and strokes.

- Smoking is responsible for various respiratory diseases such as chronic bronchitis are the most common.

- The affected eye may be complications with smoking onset glaucoma (optic nerve disease causing a progressive loss of visual acuity).