Just like fumes from pigeon dropping could. Or bed mites that could trigger off a mean asthma attack. If you are an asthma patient, here are some uncommon facts you should know.

Attack trigger factors ::
aspirin, sleeping pills, cough mixtures. Jogging in the open air. Even constipation.

Preventives ::
Water hydrates the respiratory passages and helps loosen sputum. High coloured fruits and vegetables: red pumpkins and carrots contain flavinoids that prevent attacks. Preventive drugs reduce bornchial hyperactivity gradually.

Nebulizers have been found to control attacks most effectively. Ask you doctor about them.