moodchanges
nounUK /ˈmuːdˌtʃeɪndʒɪz/
US /ˈmuːdˌtʃeɪndʒɪz/
Mood changes are when the way you feel switches from happy to sad or grumpy and back again.
The doctor said mood changes can happen when you don't get enough sleep.
OTHER MEANINGS
2. Sudden shifts in how a person feels during the day.
Her mood changes made it hard to know if she wanted to play.
3. Changes in the emotional tone of a story or piece of music.
The song's mood changes from calm to exciting near the end.
4. Shifts in the general feeling of a group or place.
The mood changes in the classroom when the teacher announces a surprise quiz.