When someone hits vagina with penis but does not actually insert it ... can the hymen be broken ?? And why is there so much abdominal pain after that ?

Hello Sita
Thank you for writing.
The hymen may not be broken by this activity but it may be broken by many things including exercise or tampon usage or any kind of physical activity, even riding a bike. A hymen is not proof of virginity in any way.
As to abdominal pain, there should be no connection other than possible stress regarding sexual activity.
Best,
Susan