If the local temperature is normal to feel and the warmth is a feeling of pain, then it's patellofemoral pain secondary to patella malalignment at the patellofemoral joint. This is due to strength imbalances between the muscles controlling the same secondary to prolonged sitting in awkward knee angles.
Next Steps
sit and work in an ergonomic manner, avoid prolonged sitting and get necessary treatment.
Health Tips
we can do a teleconsultation if you want.