The Net Doctor explains how seasonal changes can affect our sleep.
As the light levels change as we go into summer, our sleep cycle also changes as melatonin levels (the hormone that makes us sleepy) begin to rise earlier in the evening and fall off earlier in the morning. We might start to feel the need to go to bed earlier and wake up earlier.
The sleep control centre in the brain is highly temperature sensitive so hot humid conditions can make it more difficult to sleep. The solution might be to simply sleep in a cooler room with open windows and a fan.
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