If you are experiencing occasional pain in your right ear, especially in the evening, it is important to consider various factors such as recent medication changes, exposure to water in a pool or spa, or a recent cold or sinus infection. If the pain is mild and has been present for less than 2 days without any other severe symptoms, such as fever or a perforated eardrum, it may not be necessary to see a doctor. However, if the pain persists or worsens, it is advisable to seek medical attention as you may require antibiotics or further treatment.