Updated

Doctors have ordered a month's rest for Argentine President Cristina Fernandez after finding blood on her brain due to a head injury.

Fernandez's spokesman issued a statement Saturday night saying the president had suffered a previously undisclosed blow to the head on August 12.

Spokesman Alfredo Scoccimarro read a statement from the president's medical team saying that doctors did a CAT scan of her brain after the head injury and found nothing wrong, and that afterward she had no symptoms.

But Fernandez went to a hospital for checks on an irregular heartbeat Saturday, and because she was suffering headaches they looked at her skull again, too. They found a subdural hematoma, and ordered her to rest for a month.