External warmth.

When your heart breaks, it can grow back crooked.

There was this point of time in Japan when I felt so cold and freezing. Even though I was indoors. Si Kai and Geraldine threw their jackets over me and so did Michelle. I had mine over me too of course. But I was still so cold and shivering and even with the jackets over me, my insides still felt so cold. Even the warmth didn't radiate.

It grows back twisted and gnarled and hard.