When one is thirsty and feels the need to drink, it is already a sign of dehydration.
Fatigue may also depend on a dehydration condition.
The body has a constant need for water, whether doing sedentary or physical work. Getting used to drinking continuously keeps the body well hydrated and keeps fatigue away.
Mood swings: do you suffer from them too?
Seasonal changes, it is known, do not help to maintain
mental and physical balance and can be affected on many fronts. Disorders
digestion, difficulty sleeping, nervousness, mood swings,
excessive responsiveness.