Which of the following is now considered to be a result of mental origin rather than physical in nature by the medical profession?

Fatigue is increasingly recognized by the medical community as having significant mental or psychological components, encompassing factors such as stress, anxiety, and depression. This shift in understanding emphasizes that fatigue can arise not just from physical exertion or lack of sleep, but also from emotional and mental states, suggesting that psychological well-being plays a vital role in how we perceive and experience fatigue.

Headaches and chronic pain, while they can also have psychological factors, are often associated with clear physical causes or conditions, like tension headaches or migraines. Respiratory issues typically have identifiable physiological causes, such as allergies or infections, and while mental health can influence respiratory conditions (like hyperventilation), the primary origins are typically physical. Hence, fatigue stands out as increasingly seen in a mental context rather than a strictly physical one, reflecting the evolving understanding in the medical profession.