Health & Medicine Vocabulary in English

A symptom is something you notice or feel that suggests you may be ill — for example, a high temperature or a sore throat. A diagnosis is the doctor's conclusion about what illness you have, reached after examining your symptoms and running tests. Think of symptoms as the clues and the diagnosis as the answer.

Both words refer to substances taken to treat illness, and in everyday British English they are often interchangeable. However, medicine can also mean the entire field of medical science (e.g. “She studied medicine at university”), while medication almost always refers specifically to a prescribed drug or course of drugs. In an ESL context, learning medicine first is recommended, as it appears far more frequently.

In medical English, chronic describes a condition that lasts a long time or keeps coming back, such as chronic pain or a chronic cough. It contrasts with acute, which describes a sudden, short-term illness. Note that in informal British slang, “chronic” can also mean very bad or unpleasant, so context matters when you encounter the word outside a medical setting.

No — many common medicines such as paracetamol and antihistamines can be bought directly from a pharmacy or supermarket without a prescription. A prescription is required for stronger drugs, such as antibiotics or certain painkillers, which can only be dispensed after a doctor has assessed you and issued a written instruction. Learning the word prescription is important because you will need to use or recognise it in any English-speaking healthcare system.

For a doctor's appointment, you need to know the main body parts related to the area causing problems: chest, throat, abdomen, spine, joint, and lung. You also need descriptive adjectives for pain: sharp, dull, throbbing, burning, constant, and intermittent. Phrases such as "I have a pain in my..." and "It hurts when I..." are essential. Practising this vocabulary before any medical appointment in an English-speaking country will help you communicate your symptoms accurately.

A hospital is a large medical facility that provides a wide range of services including emergency care, surgery, and overnight stays. A clinic is usually smaller and focuses on outpatient appointments — you visit, receive treatment or a consultation, and leave the same day. In the UK, a GP surgery (your local doctor's practice) functions similarly to a clinic for routine appointments.

Mental health is discussed far more openly in English-speaking cultures than in many other countries, and the vocabulary appears regularly in news articles, workplace conversations, and social media. Being able to understand and use phrases like “mental health support,” “wellbeing,” and “stress management” helps learners participate in these conversations, access support services in English, and understand public health guidance.

The most common structure is “I am allergic to [substance]” or “I have an allergy to [substance].” For example: “I am allergic to penicillin” or “She has a nut allergy.” In medical forms you may also see “known allergies,” so learners should recognise the noun allergy alongside the adjective allergic. Describing an allergy clearly is a key safety skill when travelling or seeking treatment in English.

Common health advice vocabulary includes verbs and phrases such as: maintain a balanced diet, stay hydrated, get enough sleep, reduce stress, avoid processed foods, and take regular exercise. Nouns often paired with health advice: portion size, screen time, blood pressure, cholesterol, and calorie intake. This vocabulary appears in health news articles, NHS guidance documents, fitness apps, and workplace wellness programmes, making it one of the most practically useful word sets for B1 learners living or working in an English-speaking environment.

Wellbeing is a broad term covering physical health, mental health, social connections, and overall life satisfaction. In British English it appears frequently in workplace, educational, and government contexts: “employee wellbeing,” “student wellbeing,” and “public wellbeing” are all common collocations. It is distinct from health, which tends to focus on the physical, making wellbeing a more holistic and modern term that learners will encounter across a wide range of texts.