The incident happened at Dick Pond Road and SC 544 just after 5 pm, said SC Highway Patrol spokesman Sonny Collins.
A Chevrolet Tahoe was pulling onto SC 544 from Dick Pond Road when a rear door of the SUV opened and a 2-year-old child fell out, Collins said.
The toddler was injured and rushed to Grand Strand Regional Hospital, Collins said.
Erika Clay, age 24, who Collins said was driving the SUV, was given a ticket for a child restraint violation, said Collins, who also noted that there was no child seat in the vehicle.
Collins said that no one is sure how the door came open. The injuries the toddler suffered were not life-threatening, Collins said.