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Diphtheria
Diphtheria is a serious bacterial infection caused by toxin-producing Corynebacterium diphtheriae. The toxin can damage the throat, airways, heart, nerves, and other…
Diverticular Disease
Diverticular disease involves small pouches, called diverticula, forming in weak spots in the wall of the colon. Many people have these pouches…
Dizziness
Dizziness is a symptom rather than a specific diagnosis. It may feel like lightheadedness, unsteadiness, faintness, or a spinning sensation, and people…
Donovanosis
Donovanosis, also called granuloma inguinale, is a chronic bacterial sexually transmitted infection (STI) caused by Klebsiella granulomatis. It usually affects the genital…
Double Vision
Double vision, also called diplopia, means seeing two images of one object instead of a single clear image. The images may appear…
Drug Allergy
A drug allergy is an immune system reaction to a medicine that the body mistakenly sees as harmful. It can happen with…
Drug-Induced Lupus
Drug-Induced Lupus is a lupus-like autoimmune syndrome caused by ongoing exposure to certain medicines. The immune system reacts in a way that…
Dry Eye Syndrome
Dry Eye Syndrome occurs when the eyes do not make enough tears or when tears evaporate too quickly. This creates an unstable…
Duane Syndrome
Duane syndrome is a congenital disorder that affects horizontal eye movement, meaning an eye may not move normally inward or outward. One…
Dumping Syndrome
Dumping syndrome is a condition in which food moves too quickly from the stomach into the small intestine. It commonly develops after…
Dyskeratosis Congenita
Dyskeratosis congenita is a rare inherited disorder in which the body has trouble maintaining telomeres, protective structures at the ends of chromosomes.…
Dysphonia
Dysphonia is a change in the quality, pitch, loudness, or ease of your voice. Often described as hoarseness, it can make the…
Dystonia
Dystonia is a movement disorder that causes involuntary muscle contractions. These contractions can lead to abnormal postures, twisting, or repetitive movements that…
