Not seizures but definitely mental trauma and developmental issues. Not advisable to let the child cry for long hours. it is very important to spend more time with your child. you have to observe at what time the child is behaving in such a manner. you may have to take help of your family members as well as clinical psychologist if necessary. many times such behaviour may be due to some stress the child might be having as well as it might be due to some behaviour issues. you can meet your doctor who will guide you what steps can be taken to improve the behaviour of the child. the most common is usually loss of time given to the child due to the busy parents as well as due to tv mobile and laptop exposure which is not moderated.

Excessive crying doesn't cause a seizure as such U can opt for consultation for further details