my cousin's daughter 4 mth 13 days old baby girl she is active and playing but doctor told she has nerves weakness actual what are the symptoms for this.kindly advise

A. Hello ma’am See if your child is only four months and 13 days old then there would be hardly any symptoms where I can tell you that your child has a week knobs or something I think you can this probably detected with the help of a test or something and your doctor must have suggested you how we figured it out otherwise if he hasn’t then please consult your doctor and understand the entire thing into proper details