I delivered my son via an emergency c section 10 days ago. My wound Itself is healing nicely on the outside however I still have quite bad back pain when I am sitting/leaning back on the sofa which is the only position that I can get baby to feed from (with a nipple shield as he just refuses my nipple alone, breastfeeding isn’t easy 
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My question really is whether I can use a hot water bottle on my lower back when I’m sitting/lying down? Or if anyone has recovery tips.