Grace Wang can only watch as others kiss, cuddle and hold her baby son.

The 33-year-old Sydney mother was left paralysed from the waist down and suffered painful nerve damage after she was injected with a powerful skin antiseptic instead of a saline solution during an epidural while giving birth to Alex.

Paralysed from the waist down ... Grace Wang is reliant on her husband Jason.

She has gone through two brain surgeries and rehabilitation since the mix up at Sydney's St George Hospital in June last year.

More than a year on, Ms Wang still cannot embrace her baby, who turned one on Sunday.