Figure 1.3. Yellow, the color of smileys. Green. Green is most commonly associated with nature. Itâs a soothing color that symbolizes growth, freshness, and hope. Thereâs little doubt why the color has been so closely tied with environmental protection. Visually, green is much easier on the eyes, and far less dynamic than yellow, orange, or red.
Circulatory problems could also cause leg cramps while sleeping because of the poor or reduced supply of oxygen to the muscle and tissue. Nocturnal cramps can affect anyone from any age group. However, in most cases, it affects people with poor circulation in their limbs especially pregnant or elderly women.
Thyroid disease. An overactive thyroid gland (hyperthyroidism) can cause sleep problems. The disorder overstimulates the nervous system, making it hard to fall asleep, and it may cause night sweats, leading to nighttime arousals. Feeling cold and sleepy is a hallmark of an underactive thyroid (hypothyroidism).