The use of aerosol cans with aerosol inhalation in children with asthma has the following advantages: 1. easy to use, no complicated inhalation techniques; 2. reduced deposition of drugs in the oropharynx; 3. increased bioavailability of drugs; 4. reduced stress reactions in the airways produced by projectile agents, etc. The use of the fog storage tank is as follows: 1. Connect the aerosol to the interface of the fog storage tank. 2, mouth and lips containing the mouthpiece of the fog storage tank or inhaled through the mask. 3, spray into the canister after continuous breathing 0.5 ~ 1 minute. 4.Follow the steps of deep inhalation, breath holding and slow exhalation when breathing, and keep natural breathing for younger children who will not cooperate. 5, glucocorticoid aerosol inhalation is over that wash your face, deep rinse mouth. Note on the use of the storage fog tank: 1, the spray into the tank should be inhaled as soon as possible, more than 20 seconds because of aerosol deposition in the tank can lead to a reduction in the amount of inhaled drugs. 2, each inhalation of a spray, should not be pressed continuously several spray, so as not to exceed the dose. 3.Children younger than 4 years old should use mask inhalation, and must wash face and rinse mouth after drug administration. 4, in order to avoid the impact of static electricity, when each cleaning of the fog canister after the first use, you can first snap 2 sprays of drugs into the canister, so that the surface of the canister adsorption relative saturation before normal use. 5, plastic fog tank is generally cleaned once every 2 weeks or so, it is not recommended to clean frequently. Stainless steel fog storage tank can reduce drug adsorption.