Conversation: The conversation between human and AI assistant.
[|Human|] Hi, my five year old son has low MCV low MCH and high RDW and high nuetrophils and slighlty high ESR 14 where normal range ( 0-10). He gets cough and cold very frequently and has very low immunity. While coughing ocygen levels also go as low as 91-92 %. What can be the possible cause
[|AI|]  Welcome to the ChatDoctorI understand your concerns but don't worry. The most likely reason for recurrent cough, cold with low MCV, MCH and high RDW is iron deficiency anemia with allergic tendency. But anything definitive can be said only after proper clinical examination and complete laboratory evaluation. So, I would recommend you to visit a pediatrician for check up. They may advise you for complete hologram with peripheral smear, CRP, S. Iron and ferritin, AEC, IGE and stool examination for ova and cyst if required. Hopefully it will be of help. Take care