my child is having sneezing and coughing together at nights during sleep. Is it eosinophilia?
If this very frequent yes he could have allergic problem. Usually in some seasons like winter, rain etc., allergic cases increases due to changes in weather. Occasionaly viral infection can lead to this. Try to vacuum his pillow, his blanket and bedsheet regularly, these are the most common source many allergens. Remove anything which has peculiar smell like mosquito repellents this can help. And in routine give healthy food like green vegetables and fruits which can boost his immunity.