Mask is a health supplies, generally refers to the mouth and nose to wear parts of the air used to filter into the nose and mouth, in order to block harmful gases, odor, droplets out of the wearer's mouth and nose appliances, made of gauze or paper.

From the human physiological structure, due to the human nasal mucosa blood circulation is very strong, nasal passages and very twists and turns, nasal hair from the filter of a "barrier." When the air inhaled nostrils, the air flow in the twists and turns in the channel to form a vortex, so that the nasal inhalation of the air flow is heated.

In the selection of cotton, the main to its touch and elasticity as the primary factor to determine. Feel should have a soft touch, and full of ductility. As the cotton pad is sensitive to light, including the store's lights are likely to damage its quality

Cotton side of the lines are diagonal, relatively coarse texture, the other side of the grain is honeycomb. Rough side is specifically used in the T word parts, because the T part of the stratum corneum thicker. The delicate side is used in the V word parts.

High fever children the most simple, effective and safe cooling method is to use 25% -50% alcohol sponge bath physical cooling method. Soaked with cotton balls wipe children with neck, limbs, back, hand, foot and heart and other parts.

Cotton ball as a home of medical supplies, is home essential. So how to use cotton balls? Use cotton balls should pay attention to health, to prevent secondary pollution.