Thanks for writing to us.
The indent under the knuckle with a severe pain
could be due to a tendon injury
in the area. You need to consult an orthopedician even if no fracture
has been detected on X-ray.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Praveen-Tayal
Dr. Praveen Tayal