Why do i wake up in a bad mood

Waking up in a bad mood could be diet-related and caused by low blood sugar levels, so it pays to eat well before you head for bed. ‘Some people are more sensitive to low blood sugar than others, which means that their blood sugar levels can fluctuate more easily,’ says Nutritional therapist Jackie Lynch.

“There is period of time after you wake up called ‘sleep inertia,’” said Steven Bender, DDS, director of the Center for Facial Pain and Sleep Medicine and clinical assistant professor with the Texas A&M College of Dentistry. “During this time, we are typically groggy, drowsy, disoriented or grumpy.”