My 6months old baby cries a lot when she feels sleepy. i think she found difficulty while sleeping. or may be she don't lnoe how to sleep.what to do?

Normal: Babies cry when hungry, tired, teething etc. I.E. Babies cry a lot. All babies know how to sleep, but many have trouble settling. You need to help baby settle down. Soft lighting, soft music, bedtime routine. You can rock her, walk her, talk to her, coo and cuddle. Make sure she does not have colic--baby will pull up legs to tummy and scream-- for hours at a time. If colic, pediatrician visit.