Got me interested when you said symptoms of boredom, looked a few up and ask if you are suffering from any of the following:-
1. Frequent drowsiness.
2. Slow passage of time.
3. Vanity and self-absorbtion
4. Listleness or fatigue.
5. Moderate to severe depression.
6. Lack of commitment to goals and plans.
7. Wishful thinking
8.Preoccupation with romantic or heroic fantasies
9. Vague discontent.
Know you will have fun putting yer' own answers in against these, please feel free, may pass a few minutes...
10. Kicking the furniture dog, cat, children or husband .. that's my addition.
Seems a type of brain disease, but no worries, considered non fatal.