Hi, Welcome to icliniq.com. Sorry to hear that an accidental hit to your elbow is troubling you a lot. By the looks of it (attachment removed to protect patient identity), you do not seem to have any bony injury, especially if you are able to move your elbow (flex and extend it) without pain. The only thing that I can think of is that you might have injured your ulnar nerve which is just behind the medial edge of the elbow. This would be more likely if the tingling sensation that you are getting is along the little and ring finger of your hand, which would be more if you tap just behind the medial aspect (inner aspect) of your elbow.
Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.