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.
Thrombocytosis: Causes, Symptoms, and Possible Complications Thrombocytosis refers to an abnormally high number of platelets in the blood. In many cases, this condition may not cause any obvious symptoms and is often detected incidentally during a routine blood test. However, when symptoms appear, they usually indicate a more advanced stage of the disease and may lead to serious complications. Understanding the causes, potential risks, and preventive measures is crucial for maintaining good health and avoiding long-term damage. What Is Thrombocytosis? Thrombocytosis occurs when your blood contains too many platelets — the tiny cell fragments responsible for helping blood clot and…
Psoriasis: Symptoms, Causes, Diagnosis, and Prevention Psoriasis is a chronic inflammatory skin condition characterized by itchy, scaly patches that commonly appear on the knees, elbows, torso, and scalp. It affects approximately 2–3% of the global population. The condition was first described by the Roman scholar Aurelius Cornelius Celsus, a pioneer in medical science. But what exactly causes psoriasis, and how can you recognize its warning signs? Let’s take a closer look. What Is Psoriasis? Psoriasis is a chronic autoimmune skin disorder in which skin cells multiply up to 10 times faster than normal, leading to a buildup of thick, scaly…
What Is Urticaria (Hives)? Symptoms, Causes, and Treatment Urticaria, commonly known as hives, is a skin condition characterized by raised, itchy welts or patches that can vary in size and shape. These welts are the result of an inflammatory response caused by the release of histamine and other chemicals from mast cells beneath the skin. This reaction leads to swelling of small blood vessels in the dermis, producing redness, itchiness, and sometimes a burning or stinging sensation. Hives can develop for many reasons — including allergic reactions, stress, infections, or adverse responses to certain medications. While most episodes are temporary…
What Is Seborrheic Dermatitis? Causes and Prevention Principles Seborrheic dermatitis is a chronic inflammatory skin disorder that primarily affects areas rich in sebaceous (oil) glands, such as the scalp, face, and upper trunk. The condition is more prevalent among individuals with HIV infection or neurological disorders such as Parkinson’s disease. Diagnosis is usually clinical, based on the characteristic appearance and distribution of lesions. Management often includes medicated shampoos (e.g., containing tar or antifungal agents) and topical corticosteroids to reduce inflammation and control symptoms. Understanding Seborrheic Dermatitis Seborrheic dermatitis (also known as seborrheic eczema or seborrhea) is a chronic relapsing inflammatory…
What Is Hair Loss? Causes, Treatment Options, and Prevention Principles Hair loss occurs when the number of hairs shed exceeds the number of new hairs growing due to internal imbalances or disorders. In some cases, hair in the affected areas fails to regrow, leading to thinning hair or bald patches. Although hair loss itself does not directly affect physical health, it can significantly impact appearance and confidence, making treatment and prevention important for many individuals. Understanding Hair Loss Definition Hair loss refers to a condition in which hair growth is reduced or interrupted, resulting in more hair falling out than…
Atopic Dermatitis – Overview, Causes and Prevention What is Atopic Dermatitis? Atopic dermatitis, previously known as constitutional eczema or atopic eczema, is a chronic, relapsing inflammatory skin disease. It is strongly linked to genetic predisposition, immune system dysfunction, and environmental triggers. The condition is characterized by persistent itching, dry skin, redness, and lichenification. Treatment typically involves topical corticosteroids, immunomodulatory drugs, and proper skin care routines. General Understanding Atopic dermatitis can affect individuals of all ages but is most common in infants and young children, particularly those under 2 years old. About 80% of affected children develop symptoms before age 6,…
Acne: Causes, Symptoms and Prevention Principles Acne vulgaris is a common dermatological condition, especially in adolescents during puberty, menopausal women, and people who are frequently exposed to polluted environments. Treatment aims to reduce sebaceous gland activity, control inflammation, prevent comedone formation, decrease acne-causing bacteria, and normalize follicular keratinization. Overview of Acne What is acne? Acne vulgaris is a skin condition characterized by the development of comedones, papules, pustules, nodules, and/or cysts due to blockage and inflammation of the pilosebaceous unit (hair follicle and sebaceous gland). Acne commonly appears on the face, chest, shoulders, and back. Acne is caused by four…
Scabies: Symptoms, Causes, and Treatment Scabies is a common dermatological condition that frequently occurs in crowded living environments with poor hygiene, limited access to clean water, and inadequate sanitation. The disease spreads from person to person through direct skin-to-skin contact or indirectly via contaminated bedding, clothing, or towels that carry the mites or their eggs. Although scabies is not life-threatening, delayed diagnosis and treatment can lead to complications such as acute glomerulonephritis, eczema, and secondary infections. Overview of Scabies Scabies is characterized by intense itching caused by an infestation of the skin by the human itch mite Sarcoptes scabiei. The…
Grade 1 Obesity: Causes, Symptoms, and Prevention Obesity is defined as the abnormal or excessive accumulation of body fat that poses a risk to health. Among its classifications, grade 1 obesity (also known as mild obesity) is the most common and represents the early stage of the condition. Beyond its cosmetic implications, obesity is a serious medical issue that increases the risk of numerous diseases and health complications. Overview of Grade 1 Obesity What is Grade 1 Obesity? Obesity refers to the excessive accumulation of body fat that can negatively impact health. Having some body fat is normal and necessary…
Goiter: Symptoms, Causes, and Treatment A goiter is an abnormal enlargement of the thyroid gland that causes visible swelling in the front of the neck. Patients should seek medical evaluation as soon as possible to determine the underlying cause and receive timely, appropriate treatment. Regular thyroid check-ups are also important to monitor gland function and prevent complications. Overview of Goiter Goiter refers to an increase in the size of the thyroid gland, resulting in a noticeable swelling at the front of the neck. Depending on the cause, the swelling may or may not be painful. There are several types of…