My 7 month old child has chesty cough, and nose blocked, running nose, discharge now yellow colo 2 days now he couldn't sleep properly, not enough food?

Cold symptoms: Many of the symptoms you are described sound like an upper respiratory infection. You should consult your physician if you are concerned about a worsening illness like you described above. If you are asking if your child is no getting enough food, i would say that lack of food intake generally does not cause the acute symptoms of cough, nasal congestion and poor sleep.