Pain in anal area. What should he do?

My father he is 56, has been taking medication for heart condition cardace meto 2.5,Clavix As 75, Rosuvas. A week before on wards he is been having severe pain in anal area. He have severe pain after defecation .he is been doing sitz bath with gention violet and also taking medication Narflox 400 and pain killer. He is been consuming food container fibers too. But today he is shivering, and bp is 168/108 this haven't been this high . He took cardace meto 2.5 in the mrng usually his BP remain quiet normal  approx 110/60. Today the only thing he extra took was an ayurvedic medicine Chiruvilwadi kashayam. What can he do to relive the pain ? What can be the reason for sudden rise in pressure ? What should he do?