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  • Detached retina (retinal detachment)

    Read about a detached retina, which is where the thin layer at the back of the eye (retina) becomes loose from the back of the eye. Find out what the symptoms are, what causes it and how it's treated.

  • Dentures (false teeth)

    NHS information about dentures, including how they're fitted, how to care for them and when to see a dentist.

  • Dental abscess

    Find out more about dental abscesses, including what the symptoms are, when to get medical help, how they’re treated, and how to prevent them.

  • Dengue

    Dengue is an infection spread by mosquitoes. Find out where it's found, what the symptoms are, when to get medical help, and what you can do to avoid it.

  • Dementia

    Read our guide on dementia, which covers possible causes, symptoms and treatments, plus guidance for family and friends on living with dementia.

  • Dementia with Lewy bodies

    Find out about a type of dementia called dementia with Lewy bodies, including what the symptoms are, how it's treated and what the outlook is.

  • Dehydration

    Dehydration is when your body loses more fluid than you take in. Find out what the symptoms of dehydration are, how to prevent it and when to get medical help.

  • DVT (deep vein thrombosis)

    Find out more about DVT (deep vein thrombosis), a blood clot in a vein, usually in the leg.

  • Decongestants

    Decongestants are medicines that can provide short-term relief for a blocked or stuffy nose (nasal congestion). Find out about the different types and who can take them.

  • Deafblindness

    Read about deafblindness, a condition in which a person has a combination of sight and hearing difficulties that affect their everyday activities.