###Human: What is causing wheezing frequently in a child? ###Assistant: Hi. Generally, we would label your son a recurrent wheezer at this age. Asthma is not a diagnosis of the tender age. Wheezing is generally associated with allergy and not always can be found with a blood test. It can be an allergy to dust, pollution, dampness, pets or anything. Sometimes, we use Montelukast for a long duration to modify the wheezing condition. Ask your doctor for the same. Giving an annual flu vaccine also helps. Mantoux test is a non-specific test and does not confirm tuberculosis. Other investigations are performed in addition to the Mantoux test to confirm TB.