Talking to your doctor about brain fog

A home or overnight sleep study can record breathing, oxygen and heart rate. A laboratory study can also record brain waves and movement.

A neurologist tests strength, reflexes, sensation, coordination, eye movements and memory to see whether imaging, an EEG (brain-wave test) or longer cognitive tests would help.

An endocrinologist repeats and interprets hormone tests, works out which gland is involved and adjusts treatment. Thyroid investigation usually starts with TSH and T4 blood tests.

A rheumatologist examines the joints, skin and other organs, then chooses targeted blood tests or imaging. A clinician interprets a positive ANA result with the symptoms and examination, and does not use it as a diagnosis by itself.

They can check whether bleeding, poor sleep, mood changes or a reproductive condition is contributing, then discuss treatment for the condition or menopause symptoms. Clinicians don't use hormone therapy just to improve memory.

The clinic measures heart rate and blood pressure lying down and during a 10-minute stand or tilt-table test. It also checks whether dehydration, blood loss or a blood-pressure drop better explains the result.

For suspected celiac disease, a gastroenterologist reviews antibody tests taken while you are still eating gluten and may use an upper endoscopy with small-bowel biopsies. Other symptoms may need stool tests, imaging or endoscopy.

A hematologist reviews the complete blood count, red-cell size, iron and ferritin results, then checks whether blood cells are being lost, destroyed or not produced normally. Bone-marrow testing is only for results that call for it.

An ECG checks the rhythm at one moment. A Holter or event monitor records it during daily life, while an echocardiogram checks the heart structure when needed.

An ENT specialist can examine inside the nose and look for swelling, polyps or pus. Nasal endoscopy or a sinus CT can confirm chronic sinus disease when the examination is not enough.

An allergist compares what happens after the exposure with skin-prick or blood testing, then builds a treatment plan around the allergens that fit both.

They can check for drowsiness, withdrawal effects, duplicate medicines and interactions. Bring the containers or a list with the name, amount and time taken; the prescriber decides whether anything should change.

This specialist identifies the exact substance, route, amount, frequency and duration, then chooses tests that are valid for that exposure. Hair analysis and post-chelation urine tests do not establish heavy-metal poisoning.

A nephrologist monitors eGFR (filtering rate), urine albumin, electrolytes, blood pressure, anemia and medicines to find the type of kidney problem and slow further decline.

The specialist reviews the organism, sample, test method and past treatment, then decides if you need more tests or treatment for an infection.

The cancer team can compare the change with the treatment schedule and check other contributors such as anemia, infection, pain, sleep and medicines. They may refer to neuropsychology, occupational therapy or speech therapy.

A rehabilitation doctor assesses what you can do and coordinates physical therapy, occupational therapy, speech therapy, psychology and medicines as one plan.

A dietitian reviews what you eat, relevant blood results and any limits on digestion or absorption, then builds a food plan for that condition. Medical nutrition therapy is treatment for a diagnosed problem. It isn't guesswork with supplements.

Psychotherapy can target the specific condition with methods such as cognitive behavioral therapy, exposure therapy or structured problem-solving. A psychologist may also do psychological testing. Prescribing rights depend on location and training.

A psychiatrist is a medical doctor who can assess physical and mental factors, diagnose mental disorders, prescribe medication and monitor whether treatment improves function or causes cognitive side effects.

Several standardized tasks measure attention, memory, language, processing speed, planning and problem-solving. The results can show your strengths and weaknesses and guide support. On their own, they can't find a medical cause.

Occupational therapy changes tasks, routines and surroundings so you can manage daily activities. Speech-language therapy treats thinking problems that affect speaking, reading, writing or following conversations.

Acupuncture has evidence for some pain and headache conditions. Chinese herbal products have mixed evidence and can interact with medicines, so take the exact product list to a doctor or pharmacist.