When you praise God, you honor, worship, and express admiration for/to Him. Please understand, you are NOT praising God when you say “hallelujah”, in fact, you are merely giving a command to ‘praise the Lord”!
By His stripes, you have spiritual healing (i.e., restored favor not healing for your body). Above all, Jesus gave a spiritual solution to a spiritual problem. He did not suffer and die to heal our bodies!