Anybody who has ME or CFS (Myalgic Encephalomyelitis/Chronic Fatigue Syndrome) will be very familiar with the boom and bust cycle. ME's main characteristic is Post-Exertional Neuroimmune Exhaustion (PENE) also commonly referred to as Post Exertional Malaise (PEM). Feeling really ill, weak and exhausted after any physical, emotional or mental exertion.
This means brushing my teeth, getting excited about a visitor coming, answering the phone or writing this post is exhausting and will cause an increase in a variety of symptoms. The problem is that when I feel better on a particular day, I tend to want to do more because I feel able and would like to participate more in life, but this can be detrimental.