Thanks for writing to H.C.M.
I have gone through your query regarding pain in abdomen of your child though she is also having running nose & pain in ear.
On the basis of clinical history your daughter is appears to be having acute respiratory tract
infection involving her nose and sinuses, giving rise to painful acute otitis media
by blocking eustachian tube. Due to sinusitis she is having post nasal drip
thus infected discharge as reaches the stomach produces dyspepsia and acute lymphadenitis
in mesentric nodes, which give rise to acute pain in abdomen.
Thus you may give-
(1) tab paracetamol.
(2) Steam inhalation.
I hope this help your daughter.