3 Weeks after a DIP Dislocation in a gymnastics injury, swelling, pain, and weakness remained in the PIP more than DIP of that digit. She was unable to grip or hang/swing on bars without pain. In order to restore threat free grip, compression plus lateral rotation held enabled full pain-free passive end range flexion of the PIP. For the DIP, which was also limited in flexion, end range repeated extension restored pain-free flexion. Just a little experimentation and you can easily find desensitizing repeated loading strategies. She was prescribed to do these resets hourly and gradually work on grip strength.
[UPDATE]: Just followed up, after 4 days of the reset and grip strengthening, she was able to complete a bars routine and prior she was unable to even hang from the bar. Swelling is down, but still present, and grip strengthening needs to continue.