A young woman known to me was in a similar situation. She was sectioned and, pretty much as Jura2 has luridly described, 'tied to the bed and force-fed'. Except she didn't need to be tied to the bed as such, because her body condition was so poor she was too weak to move and she was in danger of cardiac arrest if she made any effort. The 'force-feeding' was via a vein in her arm, so not quite what the suffragettes endured. She was very close to death and one of my own Dd's in fact visited her to say her farewells. 
Thank god, no one gave up on this young woman, who I've known since birth, and now, two years on, she is fit and well and training to be a nurse, having been so inspired by those who cared for her.