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DISEASES INDEX [H]

Common Diseases List (H): Find medical advices, information and definitions about common diseases, illnesses, disorders, syndroms and deficincies. What are the signs, symptoms, causes, diagnosis, management, and treatments information. Click the disease link to view details.

H. pylori infection occurs when a bacterium called Helicobacter pylori (H. pylori) thrives in the stomach or the first part of the small intestine....
Haemophilus influenzae type b definition: Hib is an bacterium which is said to be responsible for some three million severe illnesses & an estimated 386,000 mortalities per year mainly through pneumonia & meningitis. Affected children range from five years old & below. In developing countries where a large majority of Hib deaths occur, pneu...
Haemophilus influenzae type b definition: Hib is an bacterium which is said to be responsible for some three million severe illnesses & an estimated 386,000 mortalities per year mainly through pneumonia & meningitis. Affected children range from five years old & below. In developing countries where a large majority of Hib deaths occur, pneu...
Hageman factor deficiency is an uncommon hereditary disorder which is characterized by the low plasma protein known as factor XII....
Hailey hailey disease definition: Hailey-hailey disease is a skin anomaly in which clusters of small vesicles that cause ruptures in the skin. These lesions cause pigmentation once they dry up & get eroded. They usually develop in the neck, groin & genital areas & spread towards the different skin-covered areas. It is an autosomal d...
Hair-pulling disease definition: Trichotillomania (or hair-pulling disorder) is a type of mental illness in which people have an irresistible urge to pull out their hair, whether it's from their scalp, their eyebrows or other areas of their body. Hair pulling from the scalp often leaves them with patchy bald spots on their head, wh...
Hairy cell leukemia is a slow-growing cancer characterized by overproduction of B cells in the bone marrow. These B cells, called lymphocytes, are a kind of white blood cell needed to fight infection. The bone marrow is unable to produce other types of normal cells as well, including platelets that ...
Hairy leukoplakia is a distinct white, irregular-shaped plaque found on the side of the tongue. This lesion is common among patients with HIV. The lesions usually contain fungi, bacteria or viruses, but are not considered contagious. Hairy leukoplakia can be treated by controlling the spread of HIV....
Hairy tongue is a condition that affects both humans & animals, characterized by a darkening of the tongue, sometimes hair growth. A fungus causes the dark appearance on the tongue, although it is a harmless condition. Most common affected are the elderly, tobacco smokers & users of antibiotics....
Hajdu-Cheney syndrome is a genetic disorder of the connective tissue which causes severe & excessive bone resorption leading to osteoporosis....
Halitosis, oral malodor (scientific term), breath odor, foul breath, fetor oris, fetor ex ore, or most commonly bad breath are terms used to describe noticeably unpleasant odors exhaled in breathing - whether the smell is from an oral source or not....
Hallermann streff syndrome definition: Hallerman-Streiff syndrome is a genetic defect characterized by malformations in the craniofacial area, ocular abnormalities, dental deformities, skin atrophy & short stature....
Hallervorden-Spatz disease (HSD) is a degenerative disease affecting the brain. The condition can lead to parkinsonism. Cases may be familial or occur sporadically. Neurodegeneration & excess iron in the brain also occur....
Hallucination is the term used to describe false perceptions towards one's senses; a person who hallucinates behaves in response to the things he sees and/or hears despite the fact that the things he perceives are not actually there....
Hallux valgus, also known as bunions, is a condition characterized by a structural deformity in the bone as well as the joint between the big toe & foot. This is a typically painful condition. The big toe may turn facing the second toe, a condition called displacement. The tissue around the joint ar...
Hamburger disease is another name for E. coli disease. It is an illness caused by consumption of contaminated & raw food. It is present among meat products such as hamburger patties....
A hammertoe is a toe that's curled because of a bend in the middle joint of a toe....
Hand foot mouth disease definition: Hand-foot-mouth disease is a common disease characterized by mouth sores, fever & rashes. Enteroviruses from the family Picornaviridae causes the disease. It is common in infants & children & is moderately contagious. Contact with feces or mucus of an infected person can trigger contagion....
Hand wringing rett syndrome definition: Hand writing Rett syndrome, or more commonly known as Rett syndrome, is a childhood neurodevelopmental disorder....
Hand-Schuller-Christian disease is a condition which lipids accumulate in the body & manifest as histiocytic granuloma in bones, particularly in the skull, the skin & viscera & which is often accompanied by hepatosplenomegaly & lymphadenopathy....
Hanhart syndrome otherwise known as the Richner Syndrome, is an autosomal recessive disorder caused by deficiency in enzyme tyrosine amono transferase (E. Hanhart: ▄ber die Kombination von Peromelia mit Mikrognathia, ein neues Syndrom beim Menschen, entsprechend der Akroteriasis congenita von Wriedt...
Hansen's disease, more commonly known as leprosy, is a chronic contagious disease that causes severe disfigurement on the skin, face, hand & feet. It was once a dreaded epidemic....
Hantavirosis is a term that describes an infection from the Bunyaviridae virus family which is transmitted from rodents. The condition occurs in China, Russia, Korean Peninsula, northern & western Europe, Brazil, Chile, United States, Panama, Canada & Patagonian Argentina....
Hantavirus pulmonary syndrome or HPS for brevity, is a deadly medical condition where the disease is transmitted by infected rodents through urine, droppings, or saliva....
HARD syndrome, also known as Walker-Warburg syndrome, is a congenital muscular dystrophy related to eye & brain abnormalities. Around 30 different muscular disorders are classified under the HARD syndrome....
Harlequin type ichthyosis definition: Harlequin type ichtyhysosis is a hereditary congenital skin disorder characterized by thick & cracking skin that splits apart due to thickening of the keratin layer. The skin contains reddish, diamond-shaped scales. It is the most severe form of congenital ichthyosis. Individuals with the condition ...
Harpaxophobia is the morbid fear of being robbed (Corsini, R., 1999. The Dictionary of Pschology, p.435)....
Hartnup disease, also known as monkey disease or Hartnup's disorder, is an autosomal recessive disorder wherein the transport of neutral amino acids to the kidneys & small intestines is defective. Sufferers have a niacin deficiency as well as an inborn error of amino acid metabolism....
Hashimoto's thyroiditis is an autoimmune disease wherein the body's antibodies attack the thyroid cells. It is also known by the name chronic lymphocytic thyroiditis. It is also the most common form of hyperthyroidism in the United States....
Hay fever, also known as allergic rhinitis, causes cold-like symptoms such as a runny nose, congestion, sneezing & sinus pressure. But unlike a cold, hay fever isn't caused by a virus, but by an allergic response to indoor or outdoor airborne allergens, such as pollen, dust mites or pet dander....
Hay-Wells syndrome otherwise known as ankyloblepharon-ectodermal dysplacia clefting syndrome is one of the type of ectodermal dysplasia (Index of Rare Diseases. National Organization for Rare Disorders. 20 Mar 2008). It thus affect tissues that arise from ectoderm especially that of the skin, hair &...
Head and neck cancer definition: Head & neck cancer is a collective term used to describe cancers that form in the aerodigestive area, in organs such as the mouth, nasal cavity, paranasal sinuses, larynx, pharynx & lip. These cancers can affect the lymph nodes when not treated early....
Head cancer is a group of cancers that occur on the head up to the organs found in the neck. Included in this group are facial cancers, oral cancers, nasopharynx & laryngeal cancers....
Head lice definition: Lice are tiny, wingless, parasitic insects that feed on the blood. Lice are easily spread - particularly by schoolchildren - through close personal contact & by sharing belongings. Head lice are those that develop on the scalp. They're easiest to see at the nape of the neck & over the ears....
Headache free migraine definition: Headache-free migraine is a condition where a patient experiences the pains of migraine attacks but with no headaches. Among the symptoms include blurry vision, nausea, constipation, loss of balance & vomiting. Headache-free migraine also occurs with fever, muscle weakness & body pain....
Headache, cluster definition: Cluster headache is a neurological disease characterized by extreme pain. The cyclical pattern of the pain, occurring in periods with spontaneous remissions, gives the disease its name. The "clusters" of frequent attacks can last anywhere from a few weeks to months. During remission periods, the hea...
Headache, cluster definition: Cluster headache is a neurological disease characterized by extreme pain. The cyclical pattern of the pain, occurring in periods with spontaneous remissions, gives the disease its name. The "clusters" of frequent attacks can last anywhere from a few weeks to months. During remission periods, the hea...
Headache, ice cream definition: Ice cream headache is a form of brief, intense cranial pain or headache commonly associated with consumption (particularly quick consumption) of cold beverages or foods such as ice cream, slurpees, or margaritas....
Headache, primary cough definition: Cough headaches are an unusual type of headache caused by coughing & other types of straining - such as sneezing, blowing the nose, laughing, crying, singing or bending over & straining when having a bowel movement....
Headache, rebound definition: Rebound headaches, also known as medication overuse headaches, occur when pain medications (analgesics) are taken too often to relieve headache....
Headache, sex definition: Sex headache is a rare type of severe headache that occurs at the base of the skull before orgasm during sexual activity, including masturbation....
Headache, sinus definition: A sinus headache is a headache that hapens when the sinuses become congested. During a cold or allergy attack, the openings can become congested by excess mucus & may become infected....
Headache, spinal definition: During a spinal tap, a sample of cerebrospinal fluid is withdrawn from the spinal canal. During spinal anesthesia, medication is injected into the spinal canal to numb the nerves in the lower half of the body. If spinal fluid leaks through the tiny puncture site, a spinal headache may develop....
Headache, tension definition: Tension headaches are the most common type of primary headaches. The pain can radiate from the neck, back, eyes, or the other muscle groups in the body. Tension-type headaches account for almost 90% of all headaches....
Headache, thunderclap definition: A thunderclap headache is a severe headache that occurs suddenly. Since it is sometimes a sign of a medical emergency, one should seek immediate medical attention for any headache that occurs suddenly & severely....
Headaches in children are a common problem among children. But chronic headaches among children may be a sign of other underlying illness so this condition must be given immediate attention....
Hearing disorders, also known as hearing loss or hearing impairments, are conditions wherein there is full or partial decrease in hearing quality. Environmental & biological factors can bring about various types of hearing disorders. Hearing disorders are classified into sensorineural, conductive & ...
Hearing impairment refers to reduction in sensitivity to sounds, which may be accompanied by some loss in the ability to correctly interpret auditory stimuli even when amplified (Stolov, W., Clowers, M. 2000. Handbook of Sever Disability,p. 395)...
Hearing loss is a the decrease, whether full or partial, of the ability to detect or understand sounds (Speech & Language Terms & Abbreviations. Retrieved on 2006-12-02)....
Heart arrhythmias definition: Heart rhythm problems (or arrhythmias) occur when the electrical impulses in the heart that coordinate the heartbeats don't function properly, causing the heart to beat too fast, too slow or irregularly....
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