You should use nasal drop n mk a sitting position for baby n then feed.. Otherwise still problem can consult ur pediatrician

Thank you Roopashree

The phlegm accumulation is common. Sit and take baby in lap and feed. If there is nose blockage, ask doctor...they will give "saline water drops" , a nasal drop. Just a drop will help. Buy eucalyptus oil and put few drops to the pillow or cloth where he sleeps. It will help in breathing.