Hi Doctor My baby born underweight due to IUGR 2.03kg.She has gained 120 gms when we weigh her last monday.But from last 3 days i see her sleep pattern is completely changea and she is getting more fussy day by day. Earlier she used to fall asleep innediately after feed but now if u put her on bed she immediatly wakes up.She wakes up from 12 am till 4 5. Ans from last 3 4 days i am noticing she is contionously asking for feed showing lips smacking and alwaya open mouth side wise even i fed her immedately . Is there something to worry , shall i take her to doctor for any further assessment.