My father is 48 years old & he plays badminton regularly. today after playing he got dizziness & lied down. it is severe when he moves head what 2 do?

Try hallpike maneuve: the hallpike maneuver might work . You can google it and if not effective, needs to see a neurologist or ENT

Shuttlecock Vertigo: The onset of true vertigo from playing badminton can occur from the sudden movements of the head resulting in the jarring loose of calcium carbonate crystals in the vestibular apparatus (semicircular canals) One develops a case of benign positional vertigo that will eventually resolve. A trip to the clinic may expedite recovery (Epilay Maneuvers can be administered) I call it Shuttlecock Vertigo.