The condition known as tendonitis, tennis elbow, lateral epicondylalgia, or lateral epicondylitis affects the radiohumeral joint and causes persistent, severe discomfort in the elbow. It commonly affects those who work in professions that need repetitive forearm motions, like athletes who play on courts, computer operators, and woodworkers. It tends to originate from additional rapid, tiresome, recurring eccentric contractions and activities that grab gliding joints. It commonly affects the dominant hand. This case report describes the author’s seven years of experience living with lateral epicondylitis, including functional disability in day-to-day life, and then physiotherapy management was started. Mill’s and Cozen’s tests were performed, and lateral epicondylitis was confirmed. From 2023, the physiotherapy session, including active release technique and conventional therapy, was taken regularly for four weeks. The outcome measure score of the Visual Analog Scale (VAS) was 7/10 pre-treatment and 2/10 post-treatment, and for the Patient-Rated Tennis Elbow Evaluation (PRTEE) scale, it was 50/100 pre-treatment and 25/100 post-treatment. The results that are reported from this particular case study suggest that physiotherapy has a significant effect in improving muscle strength, increasing range of motion, improving activities of daily living, and enhancing the overall quality of life. The study concludes a physiotherapist is crucial in treating these overuse injuries and returning the patient to their daily activities.