Dar es Salaam, Aug. 31 -- Not many parents are aware that asthma is the most common chronic lung disease in children.

Poorly controlled and undiagnosed asthma in young kids can result in numerous trips to hospitals, missed workdays for parents and suffering that most kids can't express.

Most children with asthma have symptoms before they turn five.

The bronchial tubes-the passageways that allow air to enter and leave the lungs-in infants, toddlers and preschoolers are small and narrow.

Head colds, chest colds and other illnesses can affect these airways, making them even smaller. In very young children, it may be hard for parents, and even doctors, to recognize when symptoms are caused by asthma.

The signs of childhood asthma can range...