"I have irritated corners of my mouth and have difficulty opening my mouth?"

It sounds like you may have chapped or irritated corners of your mouth and are having difficulty opening your mouth. To help with this, it is recommended to keep the area hydrated and protected. You can try applying a 0.5 to 1% hydrocortisone ointment twice a day. Throughout the day, you can also apply a moisturizing lip balm, such as Vaseline, to keep your lips hydrated. Make sure to apply the moisturizer frequently, including before meals or drinking, to prevent further irritation when opening your mouth. If you have any other questions, feel free to ask for more assistance.