Can damage of the end of the abdominal wall cause pain initially? can it make a person loose weight and effect bowel movement? is constipation involve

Unclear. What do you: mean by "end of abdominal wall". As Soul↔Mind↔Brain↔Body creatures, sensation of pain signals from body to brain help prevent injury/death, yet there are many more complex interacting issues & mind/brain are dominant. Thus if mind interpretation of events changes decisions then all kinds of body behaviors change in response (including changes in eating/use-of-food/weight & bowel patterns).