no problem no problem. Effects from hitting someone in the temple are usually immediate, blurry vision, dizziness, etc. And only usually for a few seconds. If you begin to have headaches in the next so many days I would have someone check it out.
...you get your 'Bell" rung !
any head strike has the potential for serious injury. if any bruising, bleeding, dizziness, or anything that indicates something is amiss; see urgent care asap.