An apple a day keeps the Doctor away…

Tel: 01439 770288 | Fax: 01439 771169

Please note that this service is provided by NHS Choices not Helmsley Medical Centre, Please contact the Surgery or 111 if out of hours, if you have any concerns.

Neuroendocrine tumours are rare cancerous or non-cancerous tumours. If a tumour releases hormones, it can cause symptoms. This is known as carcinoid syndrome.

Read about hyperacusis, an intolerance to sounds that are not an issue for most other people. Find out about the symptoms, causes and treatments.

Nail patella syndrome is a rare genetic condition that can involve problems with the nails, bones, kidneys and eyes. It's thought to affect about 1 in 50,000 people.

Find out about a number of different nail abnormalities, including brittle or crumbly nails, thickened, overgrown nails, indented, spoon-shaped nails and an infected nail fold.

Nasal and sinus cancer affects the nasal cavity and sinuses. Find out about the symptoms, causes, treatments and outlook, with links to more information.

Find out what nasopharyngeal cancer is, what the signs and symptoms are, what causes it, and how it's diagnosed and treated.

Read about neck pain or a stiff neck, which is a common problem and generally nothing to worry about.

Necrotising fasciitis is a rare but serious bacterial infection that affects the soft tissue under the skin. Find out what the symptoms are and how it's treated.

Information on neonatal herpes (herpes in newborn babies), with links to other useful resources.

Read about nephrotic syndrome, a condition that causes the kidneys to leak large amounts of protein into the urine. This can lead to a range of problems.

Find out what neuroblastoma is, what the symptoms are, how it's diagnosed and how it's treated.

Neuroendocrine tumours (NETs) are a wide-ranging group of rare tumours that develop from neuroendocrine cells.

Neuromyelitis optica (NMO), also known as Devic's disease, is a rare neurological condition.

People who suffer night sweats will typically wake in the night to find their bedclothes and bedding drenched, even if their bedroom temperature is cool. This abnormal sweating is annoying, but usually harmless.

Many children experience nightmares and night terrors, but most grow out of them. They don't cause any long-term harm to your child.

Nipple discharge may be caused by pregnancy, breastfeeding or a wide range of conditions, most of which are harmless or easily treated.

Non-alcoholic fatty liver disease (NAFLD) is caused by a build-up of fat in the liver. It often affects overweight or obese people. Although NAFLD doesn't usually cause serious problems, you should take steps to stop it getting worse.

Read all about norovirus, including how it's spread, what the symptoms are, when to get medical advice and how to stop it spreading.

Read about non-steroidal anti-inflammatory drugs (NSAIDs), a widely used medicine for relieving pain, reducing inflammation, and bringing down a high temperature (fever).

Jaundice is a common and usually harmless condition in newborn babies that causes yellowing of the skin and the whites of the eyes.

Read about narcolepsy, including the symptoms, causes, and how it's diagnosed and treated.

Nasal polyps are swellings of the normal nasal lining that occur inside the nasal passages and sinuses (air-filled spaces behind the nose, eyes and cheeks).

Neonatal respiratory distress syndrome (NRDS) is a serious medical condition where a newborn baby's lungs cannot provide their body with enough oxygen. It can be treated before or after birth.

Neurofibromatosis is the name for a number of genetic conditions that cause tumours to grow along your nerves.

Neurofibromatosis is the name for a number of genetic conditions that cause tumours to grow along your nerves.

Non-allergic rhinitis is inflammation of the inside of the nose that isn't caused by an allergy.

Read about urethritis, non-gonococcal urethritis and non-specific urethritis. Urethritis is inflammation of the urethra and is usually caused by an infection.

Non-Hodgkin lymphoma is an uncommon cancer that develops in the lymphatic system, which is a network of vessels and glands spread throughout your body.

Read about Noonan syndrome - a genetic disorder that causes a wide range of features, such as heart abnormalities and unusual facial features.

Read about the causes of nosebleeds, how to treat them at home and when you should seek medical advice.

The NHS Health Check is a health check-up for adults in England aged 40 to 74.