What causes fatigue and weakness?
Common causes of weakness include:
- the flu.
- thyroid disease.
- depression or anxiety.
- a lack of sleep.
- poorly managed or undiagnosed diabetes.
- congestive heart failure.
- vitamin B-12 deficiency.
Why am I always tired and have no energy?
Possible causes of chronic fatigue can include anemia, diabetes, hypothyroidism, hepatitis C, sleep apnea, obstructive sleep apnea, chronic fatigue syndrome, urinary tract infection, food sensitivities, heart disease, depression, anxiety disorder, and nasal congestion[*][*].
What causes sudden extreme fatigue?
The wide range of causes that can trigger fatigue include: Medical causes – unrelenting exhaustion may be a sign of an underlying illness, such as a thyroid disorder, heart disease or diabetes. Lifestyle-related causes – alcohol or drugs or lack of regular exercise can lead to feelings of fatigue.