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  Lyme Disease: Definition, Symptoms, Treatments, and Side Effects Lyme disease is a bacterial infection caused by Borrelia burgdorferi (and in rare cases, Borrelia mayonii ), primarily transmitted through the bite of infected black-legged ticks, also known as deer ticks.   This disease is most prevalent in North America, Europe, and parts of Asia.  It is named after the town of Lyme, Connecticut, where it was first identified in the 1970s.  Early diagnosis and treatment are crucial to prevent severe complications. Definition Lyme disease is a multisystem inflammatory condition that affects the skin, joints, nervous system, and heart.  It progresses in stages—early localized, early disseminated, and late disseminated.  The infection begins at the site of a tick bite and can spread throughout the body if untreated.  The causative bacteria enter the bloodstream, prompting immune system responses that lead to a range of symptoms. The disease is ...

  Headache: Definition, Symptoms, Treatment, and Side Effects Headache is one of the most common medical complaints experienced worldwide.  It can range from mild, temporary discomfort to severe, chronic pain that significantly impacts quality of life.  Understanding headaches involves exploring their definition, symptoms, treatment options, and potential side effects of treatments. READ MORE:- Definition of Headache A headache is defined as pain or discomfort in the head, scalp, or neck area.  It occurs due to the activation of pain-sensitive structures in or around the brain.  Headaches are broadly categorized into two types: Primary Headaches : These include migraines, tension-type headaches, and cluster headaches. They are not caused by underlying medical conditions. Secondary Headaches : These are a result of another condition, such as sinus infections, head injuries, or brain tumors. Symptoms of Headache Symptoms of a headache can vary depending ...