Asthma is a condition that affects hundreds of thousands of people out there. And though the symptoms are largely the same, the disease varies from patient to patient, each one having different triggers for attacks. This helpful video from Everyday Health helps explain asthma and its triggers, which can include:

• Exposure to cigarette smoke
  
• Allergens, particularly seasonal one
• Dust
• Plants, grass and other vegetation
• Mold
• Cardiovascular exercise
• Pets and animals
• Cold air

When you're suffering from asthma, it's important to talk to your doctor about your condition -- although the triggers might not be obvious to you, your doctor can usually determine what your triggers are through tests or even just dialogue.