Thank you very much for your excellent question.
The sign of appendicitis
are pain in the right illiac fossa associated with nausea,vomiting
and sometimes high rise of temperature there are 60% patients who had history of constipation
but some have diarrhea
and on clinical examination tenderness on Mcburneys point is almost diagnostic but for definite diagnosis and planning for operation you have to do imaging and sometimes barium xray.