The bleeding may keep the left from cramping.

出血也许能使我的左手不再抽筋。

Why this should have happened is not entirely clear, but one possible explanation is that sleeping on the left keeps the junction between the stomach and oesophagus above the level of the gastric acid.

为什么会发生这种情况并不完全清楚，但一个可能的解释是，左侧睡觉可以使胃和食道之间的交界处保持在胃酸水平之上。