Diseases & Health Conditions
Educational information about diseases, symptoms, and related treatments
Managing genital symptoms
Not every symptom you notice around your genitals is caused by a sexually transmitted infection (STI...
Measles
Measles is a viral infection that spreads very easily. It's unpleasant and can sometimes lead to ser...
Mechanical neck pain
Mechanical neck pain: what it means and what to expect If you have already been told you have mecha...
Melanoma
On this page: - What is melanoma? - Symptoms of melanoma - What causes melanoma? - Tests and diagnos...
Meniere’s disease
Ménière's disease is a rare condition of the inner ear that can throw off your balance and affect yo...
Meningitis
Meningitis is an infection of the protective membranes covering the brain and spinal cord, known as...
Mesothelioma
Mesothelioma is a cancer of the mesothelium, a thin lining that covers the outer surface of many org...
Metacarpal fracture of the hand
Your injury might be called a fracture, a break or a crack. These all mean the same thing. When a b...
Middle ear infection (otitis media)
Otitis media is a middle ear infection. It causes redness, swelling and fluid build-up behind the ea...
Migraine
Migraine is a common health condition. It affects around 1 in 5 women and around 1 in 15 men, and it...
Minor head injury
A minor head injury is a bump or cut to the head that doesn't cause any serious harm to the brain. I...
Miscarriage
A miscarriage means losing a pregnancy before 24 weeks. It happens in about 1 in 5 pregnancies. Sin...
Molar pregnancy
A molar pregnancy happens when a fertilised egg ends up with the wrong amount of genetic material in...
Motor neurone disease (MND)
Motor neurone disease (MND) is a rare condition that slowly damages parts of the nervous system over...
Mouth cancer
What is mouth cancer? Mouth cancer is also called oral cancer. It's one of the more common cancers...
Mouth ulcer
Mouth ulcers are painful sores that appear inside the mouth. They can be really uncomfortable, but t...
Multiple sclerosis (MS)
Multiple sclerosis (MS) is a condition that affects the brain and/or spinal cord. It can cause probl...
Multiple system atrophy (MSA)
Multiple system atrophy (MSA) is a condition of the nervous system that develops in adulthood. It ha...
Mumps
Mumps spreads quite easily from person to person. Before the MMR (measles, mumps and rubella) vaccin...
Munchausen syndrome
Munchausen syndrome is a rare mental health condition where a person pretends to be ill. They may ev...
Muscular dystrophy
Muscular dystrophy (MD) is a group of muscle conditions passed down through families. It causes mus...
Myalgic encephalomyelitis (ME) or chronic fatigue syndrome (CFS)
Myalgic encephalomyelitis (ME), also called chronic fatigue syndrome (CFS), is a long term nervous s...
Myasthenia gravis
Myasthenia gravis is a long term (chronic) illness that causes muscle weakness and tiredness. It's a...
Mycoplasma genitalium (Mgen)
Mycoplasma genitalium (Mgen) is a bacterial infection. It can affect the cervix, the inside of the p...