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Published in on Feb 26th 2026

Why Am I So Tired? Understanding Fatigue in Perimenopause and Beyond

If your daily routine is starting to feel especially taxing, or rest is no longer leaving you feeling fully restored, you may be experiencing perimenopause. While occasional tiredness is normal at any stage of life, the hormonal shifts in your 40s and 50s — the years leading up to menopause — can make fatigue more persistent and harder to shake. Understanding these changes can help you take practical steps to feel more like yourself again.

Fatigue and Perimenopause

Perimenopause is the transition leading up to menopause, when the ovaries gradually produce less estrogen and progesterone. Beyond reproductive health, both hormones play a role in sleep regulation, energy levels, mood, and metabolism.

As these hormone levels fluctuate, many women experience:

• Irregular periods
• Low energy
• Irritably
• Anxiety
• Sleep disturbances such as insomnia and/or night sweats
• Hot flashes

When several of these symptoms occur at the same time, it’s common for fatigue to feel particularly severe and persistent.

When Fatigue May Signal an Underlying Condition

Although hormonal changes are a common cause of fatigue during perimenopause, it’s important not to assume hormones are the only explanation. Persistent or severe fatigue can sometimes indicate other medical concerns that warrant evaluation.

Other possible causes of fatigue include:

• Thyroid imbalance: An underactive thyroid (hypothyroidism) can cause low energy, weight changes, and feeling cold.
• Anemia: Heavy periods can lead to low iron levels, causing fatigue, weakness, and shortness of breath.
• Depression or anxiety: Mental health conditions can significantly affect sleep and energy.

If fatigue is persistent, worsening, or interfering with daily life, a thorough medical evaluation can help identify the cause and guide appropriate treatment.

Steps to Support Yourself During Perimenopause

Several lifestyle changes can make the transition to menopause feel more manageable and help stabilize energy over time. Even small adjustments can make a meaningful impact on your daily stamina. If you feel your energy levels failing, you may want to consider:

• Prioritizing sleep hygiene by keeping a consistent sleep schedule, limiting screen time before bed, avoiding caffeine late in the day, and keeping the bedroom cool to limit night sweats.
• Optimizing nutrition by eating balanced meals with adequate protein, iron, and complex carbohydrates.
• Getting adequate exercise by incorporating regular movement into your routine, such as walking, yoga, or strength training.
• Managing your stress with mindfulness, deep breathing, or taking short breaks during the day.

In addition to these changes, it may also be helpful to speak with your clinician, who can help determine whether additional support or treatment is needed.

Pacific Women’s OB/GYN is Here to Help

Fatigue during perimenopause and menopause is common, but it shouldn’t be something you have to “push through”. Many of the symptoms caused by hormonal changes during this period can be addressed with the right evaluation and support.

At Pacific Women’s OB/GYN, our team works with patients to understand what may be driving ongoing fatigue and develop a plan to help them feel more like themselves again. If persistent fatigue is affecting your daily life, it may be time to take a closer look. Schedule an appointment to discuss your symptoms and explore options for support during perimenopause, menopause, and beyond.