My baby boy is 6 months old. His neck is not firm still. Its shaking lightly What to do ?

A. Hai good morning !! As baby is 6 months old check if baby reached milestones roll over,holding neck ,trying to crawl ,sitting with support. In general by 3-4 months babies roll over and hold neck by 4-5 months , If you observe delay in roll over or not holding neck then check with Developmental paediatrician.