Thanks for using Apple Support Communities, it's great to have you here. I understand you're having some trouble scrolling when using your iPhone. I'd be glad to help you get this working again.
If you're experiencing this issue in a third-party app, I would recommend using Safari as your web browser to see if it continues to occur there. If this is occurring in Safari, then I would recommend closing Safari and relaunching it. You can follow the steps in How to force an app to close on your iPhone, iPad, or iPod touch .
Once you've given that a try, if the issue persists, go ahead and reboot your iPhone and test it one more time. If you're not sure how to reboot, you can find the steps in the article titled Restart your iPhone, iPad, or iPod touch .
I hope you find this helpful.
Best regards.