I am not sure about the problem with your baby's arm without being able to see her. It is possible that she has a weakness of her left arm which is known as an 'Erb's palsy'.This is only a possibility based on your description and it is also possible that she does not have a problem with her left arm at all.It is really necessary for your baby girl to be seen by a paediatrician soon so that a proper diagnosis can be made.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.