According to dictionary.com, it is "a lesion of the skin or of a mucous membrane, such as the one lining the stomach or duodenum, that is accompanied by the formation of pus and necrosis of surrounding tissue, usually resulting from inflammation or ischemia."
According to me, it is a daily thing.
Every since I was young, I've been ulcers in ALL parts of my mouth. Underneath the tongue, on the tongue itself, low lips, on my gums, both sides of the mouth, and most recently, upper lip. I never thought that having an ulcer on my upper lip can be so painful. At this point of time that I'm entering this entry, I have 4 ulcers. One on my upper lip, two underneath my tongue, and the last one on the right side of my mouth.
What causes them? You people get ulcers only when you accidentally bite yourself. But for me, it's not the case. It just grows by itself. No matter how much water I drink, it still happens. 365 days in one year, I can safely say that my mouth will have at least 1 ulcer for at least 250 days.
Even if you guys get ulcers, it heals within 2 to 3 days. But for my case, it doesn't! Just like the SDLC, it has 4 stages.
Initiation stage: I accidentally bite myself, or I find out that there is a small ulcer that grew by itself. Design and Development stage: It starts to grow, and if lucky, will merge with another ulcer nearby. Implementation stage: It grows to its max, and it remains like this for the next 2 weeks. Ops and maintenance stage: Starts to heal, but the cycle starts all over as another ulcer develops
So, people, if you guys get ulcers, don't ever complain that it hurts infront of me. You've never experienced worse than me.