Two of the largest ligaments of the wrist are the medial (ulnar) and lateral (radial) collateral ligaments. The MCL passes from the distal end of the ulnar and crosses the wrist to attach to the triquetrum and the pisiform. The LCL passes from the end of the radius, across the joint to the scaphoid.
One of these can be dehydration. Most people in Britain don't drink as much fluid as they need for optimum health. Although, over time, they may inadvertently train themselves not to feel thirsty, the suppressed desire to drink can result in restlessness and a host of minor problems that make sleep difficulties worse.
With sugar and short chain carbs delivering only short, quick emergency bursts of energy, sleeping through the night becomes an insurmountable task. As the amount of sleep decreases, blood sugar increases, escalating the issue. Lack of sleep has been shown to increase blood sugar levels and the risk of diabetes. (2) Higher blood sugar means less long-lasting fat metabolism in the night and even less sleep.