Experiencing daytime sleepiness is something that is usually perceived as a minor inconvenience, but for older adults, it could be an early warning sign of Dementia. This neurodegenerative disease leads to the progressive decline of brain cells. This eventually

affects memory, cognition, and personality, making everyday tasks more difficult. As one of the fastest-growing neurological disorders across the world, dementia poses a significant health threat to ageing populations.

Is Dementia Linked To Poor Sleep?

For this study, researchers followed 445 older adults (average age 76) over three years, aiming to determine whether poor sleep could increase the risk of mild cognitive impairment (MCI), which often leads to dementia. At the start, none of the participants had MCI, but by the end of the study, 36 individuals had developed the condition.

The researchers discovered that participants with poor sleep were more likely to develop MCI compared to those who slept well. However, when depression symptoms were taken into account, the link between poor sleep and MCI became less pronounced, suggesting that while sleep issues are a concern, mental health also plays a key role in dementia risk.

To assess sleep quality, the Pittsburgh Sleep Quality Index (PSQI) was used, evaluating factors such as sleep duration, disturbances, and daytime alertness. Among these, "daytime dysfunction"—defined as excessive sleepiness and low energy during the day—was most strongly associated with an increased risk of MCI. Those experiencing daytime dysfunction were more than three times as likely to develop MCI as those who didn’t report such symptoms.

There are many types of dementia:

Dementia is not a specific disease. According to the Centers for Disease Control and Prevention (CDC), it is an overall term that describes a decline in mental ability that interferes with daily life. People with dementia often have symptoms like trouble remembering, thinking, or making everyday decisions. These symptoms tend to get worse over time.

Alzheimer’s disease is the most common type of dementia, and it mostly affects the elderly. Each form of dementia has a different cause. Though dementia mostly affects older adults, it is not a part of normal ageing. An estimated 6.7 million older adults have Alzheimer's disease in the United States. That number is expected to double by 2060, as per data from the CDC.

In 2022, 3.8% of men and 4.2% women in US were diagnosed with dementia. The percentage of people increase with age from 1.7% for those aged 65-74 to 13.1% for those aged 85 and older. Alzheimer's accounts for 60 to 80% of all dementia cases and it is most prevalent in California, Florida, and Texas, as these states have the highest number of people.

Tech entrepreneur Bryan Johnson is expanding his horizons in longevity health experiments to female physiology, including monitoring his girlfriend Kate Tolo’s nighttime clitoral engorgement.

The purpose is to understand how genital blood flow may give clues about female sexual function and cardiovascular health.

The experiment is part of his extensive effort to collate data on women’s health that could be channeled into useful biomarkers.

But while research suggests a connection between genital blood flow, sexual arousal and cardiometabolic health, tracking these changes during sleep may not be an established way to screen heart disease.

Bryan Johnson Is Tracking His Girlfriend's Clitoral Blood Flow

Bryan Johnson and Kate Tolo are in the process of creating a detailed health-monitoring program through their company, Immortals. Their aim is to improve in-depth understanding of female physiology.

The process is partly inspired by research on erectile dysfunction in men. As erections depend on healthy blood vessels, erectile dysfunction can sometimes help in the detection of cardiovascular disease.

In an interview discussing the project, Tolo explained the reasoning behind investigating genital blood flow in women. “Because the penis has smaller blood vessels than the rest of the body, and so it's the first thing to show up when problems happen. So it's all about blood flow. That's why it should work for women just as well as it works for men, because we have blood vessels too,” she said. Johnson also highlighted nighttime erections as a physiological measure worth studying.

However, the evidence linking male erectile dysfunction with cardiovascular risk is more established than the evidence for using female genital blood flow measurements as a cardiovascular monitoring tool.

Also read: Bryan Johnson Blames Sugary Cereals, Soda and Stress for His Autoimmune Disease; Shares Treatment Plan

What Does Clitoral Engorgement Reveal About Sexual Health?

The clitoris contains erectile tissue supplied by blood vessels. During sexual arousal, increased blood flow contributes to genital engorgement and physiological changes associated with sexual response.

Blood circulation is therefore one component of sexual function. Reduced genital blood flow or increased vascular resistance may be associated with difficulties involving arousal, lubrication or orgasm.

A small pilot study published in the International Journal of Impotence Research examined 27 women and found that clitoral tissue perfusion was linked with scores measuring sexual function, including arousal, lubrication, orgasm and satisfaction.

The findings indicate that genital blood supply may be relevant to understanding female sexual health. However, the study was small and did not establish that nighttime clitoral blood-flow monitoring can diagnose sexual dysfunction.

Sexual function is also influenced by hormones, medications, neurological health, psychological factors, relationships and underlying medical conditions. Blood flow alone cannot explain every aspect of sexual wellbeing.

Also read: Bryan Johnson's 90-Day Experiment Claims That Oxygen Therapy Could Beat Aging

Can Clitoral Blood Flow Reveal Cardiovascular Risk?

The endothelium, the inner lining of blood vessels, helps regulate circulation. Metabolic conditions like diabetes, insulin resistance, high cholesterol, and hypertension can affect vascular function, including genital tissues.

A 2024 review published in the European Journal of Preventive Cardiology, which included 54 studies and nearly 149,000 participants, also found that women with cardiovascular disease had a higher risk of female sexual dysfunction.

This supports a relationship between cardiovascular and sexual health, but it does not validate Johnson’s tracking method.

Nocturnal genital responses may provide useful information about physiology, but researchers would need to establish what constitutes a normal pattern, how measurements vary with sleep and hormonal cycles, and whether particular changes reliably predict disease. The approach would also need to be tested in larger populations.

Pope Leo XIV has announced that he will undergo surgery in the coming days to have a nodule removed that was discovered in his lung recently. The 71-year-old pontiff said it was detected early and was well contained, which is why the doctors recommended a removal procedure.

The Vatican has not disclosed whether the nodule is benign or cancerous. The procedure has nevertheless sparked attention to lung nodules, a common medical finding that can sometimes warrant further clinical investigation to rule out cancer and other serious diseases.

“Recently, during some medical examinations, doctors found a localized nodule in my lung,” the pope said during his Sunday address in St. Peter’s Square on October 11. “It was detected at a very early stage and is well contained.”

He added, “The doctors believe it is advisable to intervene, so, following their advice, I have decided to undergo surgery to remove it. The operation is already scheduled for the next few days.” The Vatican said the pope’s recovery may take about a week.

What Is A Lung Nodule?

Also read: Lung Nodule on CT Scan? Doctors Explain When You Should Worry

Dr. Vinayak Maka, Senior Oncologist, Department of Oncology, Ramaiah Memorial Hospital told HealthandMe, "A lung nodule is a small, round or oval-shaped growth in the lung, typically less than 3 cm in size, most often discovered incidentally during a chest X-ray or CT scan done for an unrelated reason."

According to the American Thoracic Society, lung nodules may develop because of scar tissue, a previous lung infection or irritation. In a few cases, however, a nodule may be an early sign of lung cancer. Most lung nodules are benign.

"A lung nodule finding on a CT scan often triggers panic, but the reality is reassuring. Over 95% of lung nodules are benign, arising from old infections, scars, or inflammation. Still, understanding when a nodule warrants concern can be lifesaving." Dr. Vinayak Maka added.

When Does A Lung Nodule Need To Be Removed?

Also read: Sharmila Tagore’s Stage Zero Lung Cancer: Can Surgery Prevent Progression?

Doctors assess the nodule's size, shape, location, and appearance on imaging, along with the patient’s medical history and other risk factors.

Not every lung nodule requires surgery. Many are monitored through repeat CT scans to determine whether they remain stable or grow over time. Doctors may recommend additional testing or removal when:

• The nodule grows: An increase in size on follow-up scans can raise suspicion of cancer and prompt further investigation. Doctors say nodules smaller than 6 mm have a very low cancer risk (under 1%) and usually only need routine follow-up. Those measuring 6–8 mm carry a slightly higher risk (1–2.5%) and are typically monitored with a repeat CT scan after 6–12 months.

• Its appearance is concerning: Certain shapes, edges or other imaging features may make a nodule more suspicious.

• Risk factors: Older age, history of smoking, family history of lung cancer, and past exposure to substances like asbestos may be considered.

• Imaging is inconclusive: When the possibility of cancer remains significant, obtaining tissue for examination may be necessary.

• The nodule is considered sufficiently suspicious for cancer: If the risk is high, doctors may recommend surgical removal rather than relying on monitoring or a less invasive biopsy.

The decision also depends on the nodule’s location, whether it can be reached safely for a biopsy and the patient’s overall health. Surgery may provide both a confirmed diagnosis and treatment if the growth proves to be an early-stage cancer.

Stephen Liu, a lung cancer specialist at Georgetown University in Washington and division chief of haematology-oncology at MedStar Georgetown University Hospital, explained the role of surgery in such cases.

“When there is sufficient concern, and when it is safe to do so, based on the location of the nodule and the overall health of the patient, surgical removal can provide a definitive diagnosis,” he said.

Pope Leo said his lung nodule was detected at a very early stage. His planned surgery is therefore a decision made by his treating doctors based on information that has not been made public.

Italian Prime Minister Giorgia Meloni expressed support for the pontiff, saying, “I would like to express to the Holy Father my personal support, and that of the Italian government, as he faces this challenge in the coming days.”

She added, “The serenity and composure with which he spoke about it during today’s Angelus are reassuring."

Scrub typhus has claimed 15 lives at Jaipur's Sawai Man Singh (SMS) Hospital between July and September, raising concerns about the fatal infection that can be mistaken as common illnesses like dengue, malaria and typhoid.

According to reports, the hospital recorded more than 323 admissions from January to September. September alone accounted for 213 cases and nine deaths. According to the doctors, many of the deaths are attributed to organ failure, highlighting the importance of early diagnosis and treatment.

What Is Scrub Typhus And How Is It Transmitted?

Scrub typhus is a bacterial infection caused by Orientia tsutsugamushi. It spreads through the bite of infected larval mites, commonly called chiggers, which are found in grassy areas, fields, bushes and vegetation.

Humans can become infected while working in agricultural fields or getting exposed in areas where these mites thrive. Scrub typhus does not ordinarily spread directly from one person to another. Symptoms usually develop around one to three weeks after exposure but the period of incubation can vary.

Also read: Plague Treatable, CDC Monitoring US Arrivals From Russia After Worker’s Death, Says Director Erica Schwartz

Symptoms Of Scrub Typhus

Early symptoms can be difficult to distinguish from other infections. They may include:

• Fever and chills
• Headache
• Body aches and fatigue
• Skin rash
• Swollen lymph nodes
• Burning sensation in eyes
• Dry cough

Another important symptom is an eschar, a dark, scab-like mark that may develop at the site of a mite bite. It can resemble a small burn or black crust, which is often surrounded by redness. However, not every infected person develops this mark, so its absence does not rule out the infection.

Dr Vishal Gupta, a professor in the Department of Medicine at SMS Hospital, said that people should be alert if they develop any of the aforementioned symptoms of scrub typhus.

The disease is transmitted through bites from mites or fleas. It is therefore important to wear full-sleeved clothing while working in fields and use an insect-repellent cream.

Also read: Russia Plague Scare: WHO Reiterates Biosafety Rules Despite No Confirmed Lab Accident

When Can Scrub Typhus Become Fatal?

If treatment is delayed, the infection can progress towards serious complications, including inflammation of the lungs, liver and brain, kidney injury, bleeding and multiple-organ failure.

As its early symptoms may overlap with those of dengue, malaria and other febrile illnesses, diagnosis may be delayed. People with persistent fever, especially after exposure to fields or dense vegetation, should seek medical assessment and mention the relevant exposure to their doctor.

Scrub typhus is treatable with antibiotics. Doxycycline is the preferred treatment in many cases, and early treatment can reduce the risk of severe complications. Doctors may choose alternative antibiotics depending on factors like pregnancy, age and the patient's clinical history.

Treatment should be prescribed by a healthcare professional. Patients should not self-medicate with antibiotics or wait for symptoms to become severe before seeking care.

How Can You Prevent Scrub Typhus?

There is currently no widely available vaccine for scrub typhus, making exposure prevention important.

• Wear long sleeves, long trousers and covered footwear when visiting fields or areas with dense vegetation.
• Use an appropriate insect repellent according to its label.
• Avoid sitting or lying directly on grass or scrub vegetation.
• Shower and change clothes after spending time in potentially infested areas.
• Seek prompt medical care if fever develops after possible exposure.