You have really asked a good question which must bother lots of parents with their children at creches. This could simply be the so called 'creche syndrome' where a young child attending a creche is ill all the time due to repeated infections brought there by the various children at the creche.One thing your toddler does not have is 'sinus' because children do not even have any sinuses at this age.TB should be excluded but the best way to do this is by using a skin test called the Mantoux test or Tine test.If present TB should show up on the chest Xray.If her chest is clear she should be seen by a paediatrician again.She may have a problem with a constant post nasal drip due to infected adenoids.
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