When the sun is out after a long winter, every one loves it. But not the people of Canary Islands. Tourists there are being warned about the "unusually high risk" of UV rays this week. The Ministry of Health for this holiday destination has urged both, residents and visitors to take extra precautions and preventative measures to limit the impact of sun exposure over their body and skin.

The Ministry observed Aemet, Spain's national weather agency for the forecast which showed higher than normal UV or ultraviolet radiation levels in the region. It is in this backdrop that everyone in the region are requested to be extra careful when they are out in the sun. UV levels are set to reach 7, which is a 'high risk' in La Palma, El Hierro, La Gomera and Gran Canaria. Other regions like Tenerife, Fuerteventura and Lanzarote are expected to reach a level 6, which is also classed as 'high risk'.

UV Index Explained

As per the World Health Organization (WHO), a UV index is a measure of the level of UV radiation, which ranges from zero upward. The higher the UVI, the greater potential for damage to skin and eye and the less time it takes for harm to occur, notes WHO.

The range 1 to 2 represents a low risk, 2 to 5 is moderate, 6 to 7 is at high risk, 8 to 10 is at very high and anything over 11 is extremely risky for anyone to stay out.

UV radiation levels fluctuate throughout the day, with the highest values occurring during the four-hour period around solar noon. The reported UV Index (UVI) typically reflects this daily peak. Depending on geographic location and the use of daylight saving time, solar noon falls between 12 p.m. and 2 p.m. In some countries, sun protection advisories are issued when UV levels are expected to reach 3 or higher, as exposure at these levels increases the risk of skin damage, making protective measures essential.

What happens to you when you are out in sun for too long?

While sun bathing is good, being out in the sun when the UVI indicates a high or very high risk, may cause you health concerns. It can lead to sunburn, premature skin aging, incresed risk of skin cancer, eye damage and in severe cases, heat related disease.

Sunburn

It is one of the most common skin injury which happens when there is excess exposure to UV radiation from the sun. This happens when the UV radiation directly damages the DNA skin cells. These damaged cells die and shed, this is why people experience peeling after getting a sunburn.

Dehydration

This is also a common occurrence when your body loses too many fluids or electrolytes. It can also interfere with your normal body functions. You may feel dehydrated, especially when you are out in the sun, but not well hydrated. The most common symptoms are dizziness, fatigue and headache on hot days.

Hyponatremia

This is an electrolyte disorder in which your body experiences low sodium in blood. The symptoms could lead to nausea, confusion and even weakness. There are extreme cases when one may have seizures, slip into coma or die.

Heat Exhaustion

This is one of the most common consequence of being out under the hot sun. Dehydration with prolonged heat exposure can lead to heat exhaustion.

Heatstroke

When you are out under the sun and your body's core temperature cross 104°, heatstroke may occur. This is also known as sunstroke. As per the Centers for Disease Control and Prevention (CDC), it causes more than 600 deaths each year in the United States.

The U.S. Department of Defense is introducing a new policy that will require military personnel over 30 and above to undergo an annual testosterone deficiency screening as part of their routine Periodic Health Assessment.

Personnel under 30 can choose to be screened voluntarily. Those diagnosed with testosterone deficiency may opt for testosterone replacement therapy (TRT), though treatment will remain voluntary.

Why Is the Pentagon Introducing The Policy?

Defense Secretary Pete Hegseth made the announcement on Wednesday, saying the military must ensure that troops remain physically and mentally prepared for the demands of modern warfare.

Hegseth said in a video posted on X, "As we know, the modern battlefield is brutal and unrelenting. It requires and demands maximum psychological and mental readiness. I'm authorizing a new screening program for testosterone deficiency for our service members, ensuring you have the right testosterone levels to operate at your absolute best."

"By addressing these health markers early, we're keeping you on the leading edge of lethality and giving you the same level of support that you give this nation: the absolute best."

The Defense Secretary also said the goal extends beyond active military service.

"We owe our warriors the absolute best medical care in the world. Taking care of your long-term health means ensuring you remain strong, resilient, and capable, not just for your next deployment, but for the rest of your life."

Also read: Donald Trump's 'Two Mangled Hands' Spark Fresh Health Speculation

Does Testosterone Matter?

Testosterone is a hormone that plays an important role in maintaining muscle mass, bone density, strength, energy levels, mood and sexual function in men. Levels naturally decline with age, typically beginning around age 30, falling by roughly 1% each year thereafter.

Military experts say service members may face additional risk factors like high operational tempo, chronic stress, sleep deprivation, traumatic brain injury, blast exposure, and prolonged physical exertion.

Army Major Theodore Crisostomo-Wynne, a urologist at Madigan Army Medical Center, previously told an FDA advisory panel that researchers have observed hormonal disruptions among elite military personnel.

"The high operations tempo and high stress that these service members go through can actually decrease testosterone, sometimes acutely and sometimes even in the long term," he said.

Also read: Expert Highlights Key Vitamins To Combat Male Infertility And Boost Reproductive Health

Experts Warn

While low testosterone is a genuine medical condition, physicians caution that it should not be diagnosed or treated simply because hormone levels decline with age.

The American Urological Association says a diagnosis requires both symptoms of testosterone deficiency and at least two separate early-morning blood tests confirming low testosterone levels.

Experts also note that testosterone replacement therapy is intended for people with clinically confirmed deficiency, not healthy individuals seeking improved athletic performance or anti-aging benefits.

According to the Endocrine Society, using testosterone without a medical indication may increase the risk of acne, infertility, worsening sleep apnea, and other adverse effects.

What Is Testosterone Deficiency?

Testosterone deficiency, also known as hypogonadism, occurs when the body does not produce enough testosterone to maintain normal bodily functions. Common symptoms of testosterone deficiency include:

• Persistent fatigue
• Reduced muscle strength
• Low sex drive
• Depression or low mood
• Difficulty concentrating
• Reduced bone density
• Erectile dysfunction

A diagnosis requires both symptoms and laboratory confirmation, according to medical guidelines.

US President Donald Trump has sparked fresh health speculation after recent photographs appeared to show discoloration on both of his hands.

The 80-year-old president was once again seen with visible discoloration—this time on his left hand—while his right hand has previously drawn attention for recurring bruising that was often covered with concealer during public appearances.

“Bruising and discoloration was visible today on Trump's *left* hand, which is not the one that is usually mangled,” independent journalist Aaron Rupar highlighted this on social media platform X.

The accompanying photograph sparked renewed online discussion, with some social media users speculating that makeup may have been used to conceal the discoloration.

Possible Causes of Hand Discoloration

Trump's right hand has appeared bruised on multiple occasions in recent months, prompting questions about his health. However, both Trump and the White House have previously downplayed concerns.

Speaking to HealthandMe, Dr. Amit Prakash Singh, Consultant - Internal Medicine at CK Birla Hospital, Delhi, explained that hand discoloration can have several possible causes, including:

• Bruising (bleeding under the skin)
• Reduced blood circulation or low oxygen levels
• Swelling due to fluid retention
• Infection or inflammation

"A purple or blue patch often suggests bruising, blue fingers may indicate circulation or oxygen issues, puffy hands suggest fluid retention, and red, warm swelling may point toward infection," he said.

However, there is no official medical update on the discoloration in Trump's left hand. Therefore, any claims remain speculative. But it is not the first time that various speculations have been going around about the health of Trump.

Earlier this year, Trump told The Wall Street Journal that the bruising on his right hand was due to taking aspirin more frequently than recommended by his doctors. He has consistently maintained that he is in "excellent" health.

Previously, White House Press Secretary Karoline Leavitt also attributed the bruising to Trump's frequent handshakes, after the discoloration first drew public attention following the 2024 US presidential election.

Fresh Attention After Iran Remarks

The renewed focus on Trump's appearance comes after comments he made during a phone interview with Salem News Channel about Iran.

Trump said, "They would have had a nuclear weapon within two to four weeks had I not hit them... Once they had a nuclear weapon, they would have used it."

The remarks prompted criticism online, with some commentators questioning his phrasing and pointing out that the White House had earlier stated Iran's nuclear infrastructure had been "obliterated."

Some social media users also noted Trump's repeated use of the phrase "two weeks," with one commenter asking why he frequently refers to that timeframe.

Donald Trump’s Physical At Walter Reed

In a recent post, Trump said that his latest physical examination at Walter Reed National Military Medical Center came back clean, renewing public attention to his health and well-being.

Trump wrote, “I just finished a perfect physical at Walter Reed... I do it every six months, and I requested another Cognitive Test... I aced them all. Got every question right.” He also reiterated that “everything checked out perfectly.”

After Trump's post sparked confusion over whether he had undergone a medical checkup recently, the White House clarified that he was referring to the physical examination conducted in May.

The World Health Organization (WHO) today released updated guidelines aimed at reducing the risk of cognitive decline and dementia, a condition that affects more than 57 million people worldwide.

Nearly 10 million people are diagnosed with dementia every year. While there is currently no cure, the WHO says up to 45 per cent of dementia risk can be prevented or delayed by addressing modifiable risk factors such as tobacco and alcohol use, physical inactivity, social isolation, air pollution, and noncommunicable diseases (NCDs), including high blood pressure and diabetes.

Beyond its impact on memory, thinking and daily functioning, dementia also affects a person's independence, dignity and safety.

"We know more today than ever before about what drives dementia risk, and these guidelines translate that knowledge into action," said Dr Tedros Adhanom Ghebreyesus, WHO Director-General.

"Countries now have clear, evidence-based recommendations they can put into practice immediately to protect people's cognitive health," he added.

What Do the Updated WHO Guidelines Say?

Also read: Healthy Lifestyle Changes Improve Memory, Thinking In Older Adults At Dementia Risk: The Lancet

The WHO last issued recommendations on dementia risk reduction in 2019. The global healthy body said that the updated guidelines incorporate the latest scientific evidence and innovations in dementia prevention. The revised recommendations also provide proven interventions that can lower dementia risk through early awareness and timely action.

Further, they present an opportunity to reduce the global burden of dementia by strengthening the integration of brain health with noncommunicable disease and mental health services.

Importantly, the updated guidelines recommend several healthy behaviors and lifestyle interventions to reduce the risk of cognitive decline and dementia, including:

• Cognitive training and cognitive stimulation

• Participation in social activities for adults with normal cognition or mild cognitive impairment

• Regular physical activity

• Quitting tobacco

• Reducing alcohol consumption

• Following a healthy diet

• Reducing exposure to air pollution

The WHO also recommends effective management of cardiometabolic conditions such as hypertension, diabetes and high cholesterol as part of dementia risk-reduction strategies. Hearing aids may also be offered where appropriate, it said.

WHO Warns Against Routine Supplements

The WHO does not recommend the routine use of vitamin B and E supplements, omega-3 polyunsaturated fatty acids (PUFA), or multivitamins and minerals to prevent cognitive decline or dementia in people without a diagnosed deficiency.

According to the organization, current evidence does not demonstrate sufficient benefit to outweigh potential harmful effects.

What Is Dementia?

Dementia is an umbrella term describing a significant decline in mental function that interferes with everyday life. It commonly affects memory, thinking and reasoning abilities and is caused by underlying conditions such as Alzheimer's disease or vascular dementia.

Read More: Normal Ageing or Alzheimer's? Doctors Explain Six Key Differences to Watch For

Common Signs of Dementia

• Memory problems

• Confusion

• Difficulty finding words

• Changes in mood or behavior

• Trouble completing familiar tasks

The Growing Global Burden

Dementia significantly affects an individual's ability to live independently, work and perform daily activities while placing a substantial burden on families and caregivers.

According to the WHO, dementia costs the global economy an estimated US$1.3 trillion every year, with about half of that amount attributed to unpaid care provided by family members and friends.

The WHO said understanding dementia risk factors and taking preventive action can improve health and quality of life, helping people live longer, healthier and more independent lives.