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As most cases of rickets are caused by a vitamin D and calcium deficiency, it's usually treated by increasing a child's intake of vitamin D and calcium.

Vitamin D and calcium levels can be increased by:

• eating more foods that are rich in calcium and vitamin D
• taking daily calcium and vitamin D supplements

Sunlight also helps our bodies to make vitamin D, so you may be advised to increase the amount of time your child spends outside for safe exposure to sunlight.

Your GP will advise you about how much vitamin D and calcium your child will need to take. This will depend on their age and the cause of rickets. If your child has problems absorbing vitamins, they may need a higher dose.

See preventing rickets for more information about dietary sources of vitamin D and calcium, as well as advice about how to get vitamin D from sunlight.

When rickets occurs as a complication of another medical condition, treating the underlying condition will often cure the rickets.

If your child has a bone deformity caused by rickets, such as bowed legs or curvature of the spine, your GP may suggest treatment to correct it. This may include surgery.

Genetic rickets

A combination of phosphate supplements and a special form of vitamin D is required for the treatment of hypophosphatemic rickets, where a genetic defect causes abnormalities in the way the kidneys and bones deal with phosphate.

Children with other types of genetic rickets need very large amounts of a special type of vitamin D treatment.

It's very unusual to get side effects from vitamin D, calcium or phosphate supplements if they're given in the correct dose. Your doctor will advise you about how much supplement is needed, for how long, and the monitoring of treatment.

If the vitamin D or calcium dose is too high or the treatment is continued for too long or isn't carefully monitored, it can raise calcium levels in the blood. This can result in a condition called hypercalcaemia.

Symptoms of hypercalcaemia include:

• passing a lot of urine
• feeling thirsty
• reduced appetite
• nausea, abdominal pain, constipation and vomiting
• dizziness and headaches
• bone pain

See your GP immediately if you or your child have any of these symptoms.

If you have osteomalacia – the adult form of rickets that causes soft bones – treatment with supplements will usually cure the condition.

However, it may be several months before any bone pain and muscle weakness is relieved.

You should continue taking vitamin D supplements regularly to prevent the condition returning.