Author: Andrew Parker, MD
Andrew Parker, MD
Dr. Andrew Parker is a board-certified internal medicine physician with over 10 years of clinical experience. He earned his medical degree from the University of California, San Francisco (UCSF), and has worked at leading hospitals including St. Mary’s Medical Center. Dr. Parker specializes in patient education and digital health communication. He now focuses on creating clear, accessible, and evidence-based medical content for the public.
Lipodystrophy: Understanding the Disorder and How It’s Treated Lipodystrophy is a rare medical condition characterized by an abnormal loss or redistribution of body fat. In some areas, fat may completely disappear, while in others, it may accumulate excessively. Although there is currently no permanent cure, several treatments can help manage symptoms, reduce associated complications, and improve overall quality of life. What Is Lipodystrophy? Fat tissue is found throughout the body — beneath the skin and surrounding internal organs. It serves several essential functions, including: Storing energy in the form of calories Cushioning and protecting vital organs Regulating body temperature Releasing…
Pituitary Dwarfism: What You Should Know Pituitary dwarfism, also known as growth hormone deficiency (GHD), is a condition in which the pituitary gland fails to produce enough growth hormone. As a result, children experience delayed growth and abnormally short stature compared to peers of the same age. The disorder may be present at birth (congenital) or develop later in life (acquired) and can sometimes run in families. Treatment typically involves regular injections of synthetic growth hormone. While therapy can be effective, results vary from person to person. Importantly, children with pituitary dwarfism usually have normal intelligence, and if diagnosed and…
Hypothyroidism: Symptoms, Causes, and Treatment Hypothyroidism, also known as an underactive thyroid, is a condition in which the thyroid gland fails to produce sufficient thyroid hormones. These hormones regulate metabolism and affect nearly every organ in the body. When hormone levels are low, the body’s functions slow down, leading to fatigue, weight gain, dry skin, and other symptoms. If left untreated, hypothyroidism can become life-threatening. Early detection and appropriate management are crucial to prevent serious complications. There are two main types of hypothyroidism: Primary hypothyroidism: Caused by a problem within the thyroid gland itself. Secondary hypothyroidism: Results from issues in…
Diabetes Mellitus: Symptoms, Causes, Diagnosis, and Treatment Diabetes mellitus (commonly called diabetes) is a chronic disease that is becoming increasingly common and affecting younger age groups. Because of its complex consequences and complications, diabetes is a condition that requires proper understanding for effective prevention, early recognition, and timely management. Overview of Diabetes Mellitus Diabetes mellitus is a chronic metabolic disorder caused by either insufficient insulin production by the pancreas or ineffective insulin action due to acquired or genetic factors, leading to elevated blood glucose levels (hyperglycemia). Persistent hyperglycemia damages multiple organ systems, particularly the blood vessels and nervous system. Common…
What Is Low Blood Pressure? Symptoms, Causes, and Prevention Low blood pressure (hypotension) occurs when the force of blood pushing against the artery walls is lower than normal. It may or may not produce noticeable symptoms. When symptoms are present, they often include dizziness or fainting, and in severe cases, it can become life-threatening. The causes of low blood pressure are varied, and treatment depends on identifying and addressing the underlying reason. Understanding Low Blood Pressure Blood pressure is determined by the amount of blood the heart pumps and the resistance to blood flow in the arteries. It is measured…
Arrhythmia: Symptoms, Causes, and Treatment Arrhythmia is a serious cardiovascular condition characterized by an irregular heartbeat — either too fast (>100 beats per minute) or too slow (<60 beats per minute). This disorder affects the heart’s ability to pump blood efficiently, can occur at any age, and may happen unexpectedly. Understanding Arrhythmia Arrhythmia is a cardiac condition that presents with an irregular heartbeat, which may be abnormally fast (tachycardia) or slow (bradycardia). It can cause a fluttering, racing, or irregular sensation in the chest, noticeable during daily activities or even at rest. Most rapid arrhythmias are caused by reentry mechanisms,…
Myocardial Infarction: Symptoms, Causes, and Treatment Myocardial infarction (heart attack) is a condition in which blood flow to part of the heart muscle is blocked, leading to ischemia and necrosis of the myocardium. This blockage deprives the heart of oxygen and nutrients, which can cause severe complications or even death if not treated promptly. It most commonly occurs as a result of obstruction in one or more coronary arteries, often due to plaque buildup. Overview of Myocardial Infarction Myocardial infarction occurs when blood flow to a portion of the heart muscle decreases or stops completely due to a thrombus blocking…
What Is Hypertension? Causes and Effective Prevention Strategies Hypertension is a noncommunicable disease that poses a major public health challenge worldwide. According to data from the National Heart Institute, the prevalence of hypertension in 2015 reached 47.3% and continues to rise steadily. Understanding Hypertension What Is Blood Pressure? Blood pressure is the force exerted by circulating blood against the walls of the arteries as it is pumped by the heart throughout the body. It is one of the body’s vital signs, reflecting the overall function of the cardiovascular system. Blood pressure is measured in millimeters of mercury (mmHg) and consists…
Heart Palpitations (Tachycardia): Symptoms, Causes, and Treatment Heart palpitations occur when your heart beats faster than normal. They are often described as sensations of the heart pounding, fluttering, or racing in the chest or throat. While this symptom is quite common, it can sometimes cause discomfort or alarm. A fast heartbeat may occur in people with no underlying heart disease, but in some cases, it can signal a life-threatening cardiac rhythm disorder. The key to proper diagnosis and management is a careful evaluation of the electrocardiogram (ECG) and close observation of the patient when palpitations occur. Overview of Tachycardia Tachycardia…
Atherosclerosis: What It Is, Symptoms, Causes, and Treatment Atherosclerosis occurs when fatty deposits known as plaques build up along the inner walls of arteries, narrowing them and restricting blood flow to vital organs and tissues. Over time, this process can lead to serious cardiovascular complications, such as heart attacks, strokes, or peripheral artery disease. These plaques are formed from a combination of fatty substances, cholesterol, smooth muscle cells, and fibrous tissue that accumulate within the arterial wall. As they grow, they trigger local inflammation and cellular responses that further damage the arteries, creating a cycle that eventually leads to blockage…