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Kwashiorkor

Find out about kwashiorkor, a severe form of malnutrition that most commonly affects children in developing regions of the world where there's a limited food supply.

Kwashiorkor is a severe form of malnutrition. It's most common in some developing regions of the world where babies and children have a diet that lacks protein and other essential nutrients.

The main sign of kwashiorkor is too much fluid in the body's tissues, which causes swelling under the skin (oedema). It usually begins in the legs, but can involve the whole body, including the face.

This topic covers:

Symptoms of kwashiorkor

What causes kwashiorkor

Diagnosing kwashiorkor

Treating kwashiorkor

Recovering from kwashiorkor

Symptoms of kwashiorkor

As well as oedema, symptoms of kwashiorkor can include:

  • loss of muscle mass
  • an enlarged tummy ("pot belly")
  • regular infections, or more serious or long-lasting infections than usual
  • red, inflamed patches of skin that darken and peel or split open
  • dry, brittle hair that falls out easily and may lose its colour
  • failure to grow in height
  • tiredness or irritability
  • ridged or cracked nails

Kwashiorkor can be fatal if it's left untreated for too long because children become very vulnerable to infections.

What causes kwashiorkor?

The main cause of kwashiorkor is a lack of protein and other essential nutrients, such as vitamins and minerals.

It's most common in developing countries with a limited food supply, poor hygiene, and a lack of education about the importance of giving babies and children an adequate diet.

Kwashiorkor is rare in developed countries such as the UK, but it can occasionally occur as a result of severe neglect, long-term illness, a lack of knowledge about good nutrition, or a very restricted diet.

Although kwashiorkor can affect people of all ages, it's more common in children than adults.

Diagnosing kwashiorkor 

Kwashiorkor can often be diagnosed based on a child's physical appearance and questions about their diet and care.

However, blood and urine tests may be carried out to rule out other conditions. This can include tests to:

  • measure blood sugar and protein levels
  • check how well the liver and kidneys are working by testing the urine and blood for anaemia
  • measure the levels of vitamins and minerals in the body

Other tests may include growth measurements, calculating body mass index (BMI), measuring body water content, taking a skin biopsy and analysing a hair sample.

Treating kwashiorkor 

If kwashiorkor is identified early it can be treated with either specially formulated milk-based feeds or ready-to-use therapeutic food (RUTF).

RUTF is typically made up of peanut butter, milk powder, sugar, vegetable oil, and added vitamins and minerals.

More intensive treatment in hospital will be needed in severe cases or where there are already complications, such as infections.

Hospital treatment will usually involve:

  • treating or preventing low blood glucose
  • keeping the person warm  kwashiorkor can make it harder to generate body heat
  • treating dehydration with specially formulated rehydration solution
  • treating infections with antibiotics – kwashiorkor greatly increases the risk of infections
  • treating vitamin and mineral deficiencies – vitamin supplements are usually included in the special milks or RUTF
  • slowly introducing small amounts of food before gradually increasing the amount of food

The whole process usually takes between two and six weeks to complete.

Recovering from kwashiorkor

How well a person recovers from kwashiorkor depends on how severe their symptoms were when treatment began. 

If treatment was started early, the person will usually recover well, although children may never reach their full growth potential and be shorter than their peers.

If treatment was started in the later stages of protein malnutrition, the person may be left with physical and intellectual disabilities.

If kwashiorkor isn't treated or treatment is significantly delayed, it can lead to death.

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