Did the doctor say she was having febrile convulsions? This can happen when children have high fevers (102 or higher). It's the body's way of coping with the fever.
Here's more information from the medical website NHS direct:
Febrile convulsions are fits (seizures) that sometimes happen in a child with a high temperature. Febrile means related to fever. They can happen as a result of any illness that causes a high temperature, over 39C (102F).
Febrile convulsions usually happen between the ages of 6 months and 6 years.
Febrile convulsions can be frightening for parents, especially as they look like epileptic fits. Epilepsy is when a person has fits that aren't just caused by fever.
Children who have one febrile convulsion, are more likely to have another during the same illness or another illness. There is a slightly higher risk that they will go on to develop epilepsy. This is very rare, but the risk increases if the fit is unusual or severe, if there is a family history of epilepsy, or if the child had brain or development abnormalities before the febrile convulsion.
Around 3 children in every 100 have at least one febrile convulsion.
Most febrile convulsions last less than five minutes.
A complicated or complex seizure is when the seizure:
focuses on one particular part of the body, for example one arm twitches and shakes, but the rest of the body does not;
lasts more than 15 minutes; or
happens soon after another seizure, during the same illness.
Febrile convulsions usually last less than a minute, but they can continue for up to 5 minutes. They usually happen on the first day of an illness and do not always happen when the child's temperature is hottest. In fact, a febrile convulsion is sometimes the first sign that the child is ill.
At first the child looks hot and flushed, because of their temperature.
They become dazed or confused and black out (lose consciousness). At this point they may fall down if they have been sitting or standing.
The child's muscles tighten and this may cause them to moan or cry out.
They may stop breathing (usually for around 30 seconds) and their skin may turn a little blue.
Muscles in the arms, legs and face, and other parts of the body, twitch and shake.
The child's eyes may roll backwards.
Many children also lose control of their bladder or bowel.
They often fall into a deep sleep afterwards.
If the fit goes on for more than 5 minutes, it is important to get medical help by calling 999 for an ambulance. However, they are usually fairly short, and the child makes a full recovery. Febrile convulsions can be worrying for parents because they look similar to an epileptic fit.
Most children only ever have one febrile convulsion, but around 3 in 10 have a second convulsion in a later, separate, illness. Children are more likely to have further fits if the first was when they were very young, or if the child has a close relative (such as a parent or sibling) who had febrile convulsions.
Some people may be more likely to have febrile convulsions because they have inherited particular genes from their parents. About 20% of children who have one febrile convulsion also have a close relative who has had seizures.
Children who have frequent illnesses and infections are also more likely to have febrile convulsions.
Febrile convulsions can happen as a result of any illness that causes a high temperature, over 39C (102F). Illnesses that most commonly cause febrile convulsions include viral upper respiratory infections such as flu, ear infections, or roseola (a virus causing a temperature and rash).
Other conditions that can cause fevers are tonsillitis, kidney or urinary infections, or any of the common childhood diseases such as measles, mumps, chicken pox and whooping cough.
Febrile convulsions may happen between 8- 14 days after a vaccination (such as MMR). However, far more children have febrile convulsions as a result of measles itself. If your child has had febrile convulsions, you should still have them vaccinated in the same way as other children.
Around a third of children who have had one febrile convulsion will have another during another illness that causes a high temperature. About half of these will go on to have a third seizure. Very few children have more than three febrile convulsions