The word ulcer is gotten from the word "Ulceration" which simply means a wound in this case, an open sore along the lining of the stomach or intestines.
The wound looks like this
@DanielRegha Abeg let us be appreciating our own,did you think other countries were just there to look at us?if the Cameroon where actually the better team why didn't they beat us.keep up super eagles we are proud of you guys.
@SasDantata Can you tell the president of Nigeria to seek redress in a court of law if he is attack and brutalized? This man was on an official assignment of a very strong organization in the country