The duration of applying medication for a finger burn depends on the severity of the burn. If the burn is minor, medication is generally applied for two to three days until the pain is not significant, and then it may no longer be necessary to apply medication, as mild burns only affect the epidermis and relief from pain is sufficient. If the burn is more severe, medication may need to be applied for a longer period. Therefore, it is crucial to immediately rinse the burn under running water for at least half an hour to cool it down and minimize further progression of the burn. This action is beneficial for recovery. Additionally, if the burn is quite severe, it is advisable to seek prompt medical treatment at a hospital.