Dr. Wilmarie Rivera M.D.

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• Is There an Association Between Your Sleep and Testosterone Levels?

  Among older males, less sleep is associated with low levels of testosterone, according to a recent study. Normally, the levels of the male hormone decreases with age, and in some men, this may result in a lack of energy or libido. Researchers noted that some men manage to maintain normal levels of...

• What Are the Signs and Symptoms of Head Lice?

  Head lice are tiny, wingless, and parasitic insects that live in the human hairs and feed on blood they extract from the scalp. Head lice are a common problem, particularly in kids. They are very contagious, bothersome, and can be tough to eliminate.However, a head lice infestation is not fatal....

• How to Identify Insect Bites and Stings

  The cause or severity of insect bites or stings can be determined by the symptoms. Most bug bite symptoms cause itchy or painful red bumps. Other insect bites can cause welts or blisters. The following are some clues of common insect bites:...

• What is Head Lice: Get the Facts

  One of the most common human parasitic invasions globally is pediculosis, or the human head louse infestation. Approximately six to twelve million people in the US are treated for head lice annually. According to studies, head lice are mostly found in preschoolers and school-aged children. They nest...

• Zika Virus Symptoms: What Is Zika Virus and Travel Recommendations

  In 1947, the Zika virus was discovered and got its name from Uganda’s Zika Forest. The first human case of Zika was identified in 1952. Since then, outbreaks of the virus were reported in the Southeast Asia, the Pacific Islands, and Africa, although it was possible for Zika outbreaks to happen in...

• How Is Hives (Urticaria) Diagnosed?

  Hives are normally diagnosed by performing a detailed physical examination of the idiosyncratic reddish rash. If a patient is suffering from long-term hives, several tests may be done to establish the underlying cause.Acute Hives DiagnosisA general medical practitioner can simply diagnose mild...