brainThoughtful reading across science, with room to explore a question, follow an explanation, and notice the connections between familiar things.
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Macular degeneration does not directly cause dizziness. The macula sits at the center of the retina and controls only sharp central vision, so damage there produces distortion and blind spots but cannot trigger the vestibular,…
Read the story ↗Low-dose methotrexate has not been shown to cause cancer in humans, and the evidence overall leans against it being a carcinogen at the doses used for rheumatoid arthritis, psoriasis, and Crohn's disease.
Settle into this read ↗A fatty hilum on imaging makes a lymph node cancerous in only a small minority of cases — roughly 1% to 5% in most biopsy series of sonographically benign nodes — because the hilum is the node's normal exit door for fat and lymphatic…
Settle into this read ↗Yes. Lyme disease causes numbness and tingling in a meaningful minority of infected people, most often through a small-fiber or cranial nerve neuropathy driven by the bacterium Borrelia burgdorferi, and occasionally through late neurologic…
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Yes, lubricants can contribute to bacterial vaginosis, but not through infection — they do it by disrupting the vaginal microbiome's chemistry.
Settle into this read ↗Yes, Lyme disease can cause visible abnormalities on an MRI, but true "brain lesions" in the destructive sense are rare.
Settle into this read ↗Yes, lower back pain can make your testicles hurt, and the link is anatomical rather than imagined.
Settle into this read ↗Yes, low ferritin can cause insomnia, and the evidence is strongest when ferritin drops below roughly 30 µg/L, a threshold where brain iron stores begin to fail even though blood hemoglobin is still normal.
Settle into this read ↗Low iron does not directly cause belly fat, but iron deficiency can indirectly promote abdominal fat gain through two measurable pathways: reduced physical activity driven by fatigue, and impaired fat oxidation when iron-dependent enzymes…
Settle into this read ↗Yes, low blood sugar can cause frequent urination, though usually through indirect mechanisms rather than a direct effect on the bladder.
Settle into this read ↗Long-term gabapentin use has not been proven to cause dementia, but it is linked to a modestly higher risk in large observational studies, with hazard ratios of roughly 1.1 to 1.5 in older adults.
Settle into this read ↗Yes, low blood sugar can cause eye problems, but the effects split into two very different categories.
Settle into this read ↗Yes, low estrogen can cause bloating, and the link runs through several parallel pathways rather than a single cause.
Settle into this read ↗Low blood pressure by itself rarely causes cardiac arrest, because the body defends its circulation through reflexes that constrict vessels, speed the heart, and redirect flow.
Settle into this read ↗Yes, low CO2 in the blood can mean dehydration, but only indirectly and only in specific scenarios. Carbon dioxide measured on a metabolic panel is actually bicarbonate (HCO3-), the body's main pH buffer.
Settle into this read ↗Yes, liver damage can cause diarrhea, though it does so indirectly.
Settle into this read ↗Yes, losartan can cause hyperkalemia. It does so by blocking angiotensin II, the hormone that normally signals the kidneys to excrete potassium.
Settle into this read ↗Yes, lisinopril can be taken twice a day, but only when a prescriber deliberately splits the dose.
Settle into this read ↗Can leukoplakia be scraped off? No. Leukoplakia cannot be scraped off because it is not a surface deposit sitting on top of your tissue.
Settle into this read ↗No, lemon juice cannot reliably delay your period. There is no physiological pathway by which citric acid, vitamin C, or lemon polyphenols reach the hypothalamic-pituitary-gonadal axis and postpone ovulation or menstruation.
Settle into this read ↗Yes — liver damage can cause a skin rash, though the relationship is indirect and the rash is a signal, not the disease itself.
Settle into this read ↗Yes, lipids and total parenteral nutrition (TPN) can run together, and in most adult regimens they must.
Settle into this read ↗Yes, lisinopril can cause back pain, but it is an uncommon and usually indirect effect rather than a direct muscle side effect.
Settle into this read ↗Lidocaine can produce euphoria or a "high" only when it reaches the bloodstream in amounts far above therapeutic local anesthesia, and the effect is not a benign recreational buzz but the earliest stage of systemic local anesthetic…
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