It could be muscle spasms in the pectoral muscle and other muscles in 
the back.  It can be from poor positioning (hunching while nursing) or 
sometimes from nursing lying down if mum if contorting herself in a 
funny position.

The Newman Breastfeeding Clinic and Institute www.ncbi.ca in Toronto 
(Dr. Jack Newman and Edith Kernerman) have done research on Mammary 
Constriction Syndrome - which involves muscle spasms in the pectoral 
muscles.  They have a series of stretches the mother can do to stretch 
out that muscle.


-- 
Tania Archbold B.Sc., IBCLC
Mother's Nectar Lactation Consultant Services
519-400-7098
www.mothersnectar.ca


On 2014-09-24 08:35, Stephanie Haskins wrote:
> Hi all,
> I am somewhat new to this forum.  I am posting this for a friend of 
> mine
> with her permission.  She has a nursing 2 year old who has always had 
> latch
> issues despite a lot of breastfeeding support from IBCLC's.  Recently 
> she
> experienced a deep, achy pain behind her left breast while nursing on 
> that
> side which subsided after her daughter stopped nursing.  In the the 
> middle
> of the night she was awakened by sharp pains in her chest, back and
> shoulder.  Her husband, a nurse, evaluated her for heart attack (just 
> in
> case!) and they called the ER.  Heart attack was ruled out, she took an
> aspirin and was able to go back to sleep.  When her daughter woke to 
> nurse
> a few hours later (again on the left side), the pain came back 
> instantly.
> Could this be vasospasms?  Any other ideas as to what could be causing 
> this
> pain?  Thanks!
> 
> --
> Stephanie Haskins
> Birth and Postpartum Doula
> 607-277-7279
> Motherwitdoula.net
> 

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