"Why should I help a giant?" asked the Doctor.
"Because my friend maybe dying and you're the only person I can find that can help," replied Gwen.
"The answer is no. Everyone knows what you giants do to us humans."
"Look me and my friends are different. We actually like humans. In fact my friend is married to one. And besides you're coming with me whether you like it or not."
Gwen walked away from the town and back to where the other giantesses were. The walk took her a while but she got there eventually. The Doctor was struggling in her hand all through the journey. Sometimes she would loosen her grip a little to give him a fright.
When they got there Charlotte's condition was getting worse. Rose was doing everything that she could but nothing was working.
"Look that's my dying friend," said Gwen. "Now you have to help her."
"Ok ok just don't hurt me or anything."
Gwen put the Doctor by Charlotte and he started to examine her. He was very worried with what he was seeing.

What's wrong with her?