Diagnosis of pulpal pathologies involves taking a dental and medical history, performing an extraoral and intraoral examination including vital signs, and conducting sensitivity tests and radiography. The history focuses on the presenting complaint, dental history, and relevant medical conditions. Examination involves visual inspection, palpation, percussion, probing, and assessing mobility. Sensitivity tests like cold, heat, electric pulp testing, and laser doppler flowmetry evaluate the neural and blood supply. Radiographs like RVG and CT further aid diagnosis.