Thanks for writing to us and happy new year.
From description it seems soft tissue injury
or ligament injury
.If proper immobilisation is not given at the time of injury, healing of tissue or ligament might get hampered.
I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management. You may get the X-ray/MRI
of the area affected under his/her guidance.
Wishing you good health...