Neurological⭐⭐⭐ Very Common
Headache
/HED-ayk/Simple Meaning:
Pain or discomfort in the head or upper neck.
Cephalgia arising from pain-sensitive cranial structures (dura, intracranial blood vessels, scalp muscles, or trigeminal nerve).
Clinical & Layman Language Dictionary (Deduplicated A–Z)
Medical Terms & Simple Meanings A–Z
Search over 153+ verified medical terms. Clear layman definitions, clinical explanations, frequency ratings (⭐⭐⭐ Very Common), pronunciations, and body system tags.
Showing 10 Medical Terms (Letter "H")Reset Filters
Gastrointestinal⭐⭐⭐ Very Common
Heartburn
/HART-burn/Simple Meaning:
Burning pain behind the breastbone caused by stomach acid.
Substernal burning sensation caused by gastroesophageal reflux of acidic gastric juice irritating esophageal mucosa.
Cardiovascular⭐⭐⭐ Very Common
Heart Rate
/hart rayt/Simple Meaning:
Number of heartbeats per minute.
Frequency of cardiac ventricular contractions per minute (standard normal adult resting rate: 60–100 BPM).
Respiratory⭐⭐ Common
Hemoptysis
/hee-MOP-tih-sis/Simple Meaning:
Coughing up blood or blood-stained mucus.
Expectorated blood originating from the bronchial arteries or pulmonary parenchyma, signaling lung disease or pulmonary embolism.
Gastrointestinal⭐⭐ Common
Hemorrhoids
/HEM-uh-roidz/Simple Meaning:
Swollen, inflamed veins around the anus or rectum.
Vascular cushions in the anal canal that become pathologically engorged, causing painless bleeding or painful thrombosis.
Cardiovascular⭐⭐⭐ Very Common
Hypertension
/hye-per-TEN-shuhn/Simple Meaning:
Persistently high blood pressure (≥ 130/80 mmHg).
Chronic elevation of systemic arterial pressure exceeding established clinical guidelines, increasing stroke and heart attack risk.
Cardiovascular⭐⭐⭐ Very Common
Hypotension
/hye-poh-TEN-shuhn/Simple Meaning:
Abnormally low blood pressure (< 90/60 mmHg).
Subnormal arterial blood pressure resulting in inadequate organ perfusion and symptoms of lightheadedness or presyncope.
Respiratory⭐⭐ Common
Hypoxia
/hye-POK-see-uh/Simple Meaning:
Low oxygen levels in body tissues.
Deficiency in oxygen supply reaching tissues despite adequate blood flow, assessed via arterial blood gas or pulse oximetry.
Dermatological⭐⭐⭐ Very Common
Hives
/hyvz/Simple Meaning:
Itchy, raised red or skin-colored welts (Urticaria).
Pruritic erythematous cutaneous plaques caused by localized dermal edema following mast cell histamine release.
ENT⭐⭐ Common
Hoarseness
/HORS-nis/Simple Meaning:
Rough, raspy, or weak voice.
Dysphonia caused by irregular vocal cord vibration due to laryngitis, vocal nodules, or recurrent laryngeal nerve palsy.
This information is educational only and does not replace professional medical advice.