Fatigue

Fatigue has many possible causes, including anemia, thyroid problems and sleep apnea, so a medical check comes first. Evidence for holistic treatment of unexplained fatigue is limited, and most of it comes from studies of cancer-related fatigue.

When to see a medical doctor first

• Contact a clinician right away for fatigue with confusion or dizziness, blurred vision, passing very little urine, or new swelling with weight gain (MedlinePlus).
• Get checked in the next week or so if tiredness comes with fever, night sweats, or weight loss you didn't try for. Regular night sweats that wake you are a reason to book a visit on their own (Mayo Clinic). Mayo Clinic also advises seeing a healthcare professional if you lose more than 5% of your weight over 6 to 12 months without trying (Mayo Clinic). For adults, Mayo Clinic advises calling a healthcare provider for a temperature of 103 F (39.4 C) or higher, and getting care right away if a fever comes with a severe headache, stiff neck, confusion, trouble breathing or chest pain (Mayo Clinic: fever).
• Book an appointment for unexplained weakness or fatigue, frequent headaches, low mood or trouble sleeping (MedlinePlus).
• Snoring with gasping or choking during sleep. Sleep apnea is a known cause of tiredness and needs a sleep assessment.
• Thoughts of suicide or self-harm: call or text 988 to reach the 988 Suicide & Crisis Lifeline, free and available 24 hours a day, or chat at 988lifeline.org. If someone is in immediate danger, call 911.

What a medical workup usually checks first

Doctors usually start with a history, a physical exam and a review of current medicines. The American Academy of Family Physicians' 2023 fatigue review says the first lab tests should follow from that history, the exam and the likely causes, not a routine panel. Testing without a specific reason changes treatment in only about 5% of patients. The review lists tests by suspected cause, such as a complete blood count or ferritin (iron stores) for anemia and TSH for thyroid problems. The NHS lists blood tests for anemia, diabetes and an overactive thyroid.

Tired all the time but your blood work is normal?

Normal results are useful: they rule out several common causes. A few practical next steps:

• Ask for the actual values and which tests were run, for example whether ferritin and TSH were checked.
• Mention snoring, low mood or recent weight change, since each points to a different next step.
• Some practices advertise "optimal" lab ranges that are narrower than standard ones. We did not find a reliable source for those ranges, so ask what evidence they rest on.

For what a naturopathic doctor can and can't test for, see our guide on whether naturopathic doctors can order lab tests.

What the evidence says about holistic options

Therapy	Evidence	Notes
Mind-body (CBT, mindfulness programs, yoga)	Mixed/limited	A 2024 ASCO and Society for Integrative Oncology guideline recommends CBT and mindfulness programs for cancer-related fatigue, and says yoga may help after treatment. Not established for unexplained fatigue.
Acupuncture	Mixed/limited	The same guideline finds the evidence too limited to recommend acupuncture either way for cancer-related fatigue. It says acupressure may help after treatment.
Massage	Not supported	NCCIH presents no direct evidence for fatigue.
Supplements	Not supported	The ginseng finding in a 2023 editorial on complementary medicine for fatigue came from a lab study, not a clinical trial.
Chiropractic or spinal manipulation	Unconfirmed	No source found.
Naturopathic or functional medicine	Unconfirmed	No source found.

Unconfirmed means we found no source in this review. It is not a verdict either way.

Who people see for fatigue on this site

• Functional medicine doctors: functional medicine is a practice style, not a license, so check the clinician's MD, DO, NP or PA license.
• Integrative medicine doctors: licensed MDs or DOs.
• Naturopathic doctors in our directory: not licensed in New York.
• Acupuncture clinics and wellness centers.

You can check a New York license on the NYSED verification search.

Questions to ask a practitioner

• Which tests have you ordered, and what were the actual ferritin and thyroid values, not just "normal"?
• If labs are normal, what do you check next, and when do you refer back to a physician?
• Which supplements do you suggest, and do any interact with current prescriptions?

Last reviewed: October 2026

Sources

• MedlinePlus, Fatigue (reviewed 19 May 2025)
• Mayo Clinic, Night sweats: when to see a doctor (20 January 2024)
• Mayo Clinic, Unexplained weight loss (10 July 2026)
• SAMHSA, 988 frequently asked questions (updated 16 December 2025)
• Latimer et al., American Family Physician, Fatigue in adults: evaluation and management (July 2023)
• NHS, Tiredness and fatigue (reviewed 2 June 2023)
• Bower et al., Journal of Clinical Oncology, Management of fatigue in adult survivors of cancer: ASCO-Society for Integrative Oncology guideline update (2024)
• Asian Biomedicine, Complementary medicine for fatigue (editorial, 18 October 2023)
• NCCIH, Massage therapy: what you need to know (May 2019)
• NYSED Office of the Professions, online license verification