A potentially life-threatening asthma attack occurs every 10 seconds in the UK. The airways of asthma sufferers are sensitive to triggers, sending them into spasm, leading to coughing, wheezing, tightness of the chest and difficulty breathing. During an attack, the lining of the airways swells, which can cause a second bout of wheezing six to eight hours later. If someone has an attack, sit them down and ensure they take slow breaths and remain calm. Help them take one puff of their reliever inhaler (usually blue) every 30-60 seconds, up to 10 puffs. If they don’t improve, or they deteriorate, call an ambulance. If paramedics don’t arrive within 15 minutes, try inhaler again.