Why might women experience tiredness all the time more frequently than men?

Persistent tiredness in women is often caused by anemia, depression, thyroid disorders, or sleep disorders. Iron deficiency anemia, depression, and chronic fatigue syndrome are particularly common in women due to hormonal, nutritional, and biological factors.

Key causes of constant fatigue in women include:

• Iron deficiency anemia – often linked to menstruation or pregnancy
• Thyroid problems – such as hypothyroidism, which slows metabolism
• Depression or anxiety – which can drain physical and mental energy
• Sleep disorders – including insomnia and sleep apnea
• Chronic fatigue syndrome – a long-term condition more common in women

Because these causes share overlapping symptoms, identifying the right one on your own can be difficult—and delaying answers may allow a treatable condition to worsen. The fastest way to narrow down what's driving your fatigue is to take a free, instant, online symptom check. It only takes a few minutes, is doctor-developed, and gives you a clearer picture of possible causes so you can confidently plan your next steps with a healthcare provider.

Reviewed for medical accuracy: 07/14/2026