These are caused by disturbance in the electrical activity of the brain. A seizure may progress through stages: sudden unconsciousness, sometimes with a cry; rigidity and arching of back; breathing may cease; jerking movements begin; froth or bubbles appear at the mouth, possibly blood stained; loss of bladder or bowel control. The child regains consciousness within a few minutes and appears dazed. Afterwards she may fall into a deep sleep.