Frontal sinus symptoms and conditions

my 10 year old daughter was put on singulair by an infectious disease doctor that had seen some improvements in kids taking this who have chronic sinus infections and swelling of sinus tissues...my daughter showed an improvement in sinus problems but noticed a 20 pound weight gain from 62 to 82 pounds in a few months..owed this to better health from pill and tonsil/sinus surgery...went off singulaire that summer...at Christmas my daughter caught a bad cold which turned into a potentially fatal frontal sinus infection from infected swelling frontal sinus (called Pott's Puffy Tumor)...she was put on IV antibiotics and singulair..she takes nasonex and sudafed regularly and does daily sinus rinsing...since starting the singulair again she is increasingly hungry and she is gaining weight again...slightly moody, never feels full...but the new symptom is pain in her side at the lower rib cage..this started after singulair for 2 months...the pain wraps around her side and reaches to her navel area...last night she woke up with severe cramping in her stomach every 10 minutes like labor contractions....after an hour she developed all over hives and was having hot flashes during the cramping...she had just taken her second dose of Entex which is an expectorant to thin her sinus mucous...at the time of these symptoms she has been off her IV drugs for 3 weeks...so these other posts really make me suspect singulair for weight gain and abdominal/rib pain and cramping..anyone with similar symptoms?..

I have been on and off of pred for about 15 years in fairly low dosses, for allergies and nasal poloyps. Some of the side effects were swelling, soreness, warts on the hands, mood swings, night sweats, itching, flushing, when I was on higher doses severe night mares!! every night. A couple of years ago I had a bi cranionomy surgery for a sinius mucecell in the frontal sinus. Two polyp's had grown togather in the top of my nasal passage and the sinus couldn't drain. Any way they cut me from ear to ear across the top of my head and peeled the skin down and took a about a 3" by 3" section of skull out to remove the mucecell.
Since then I have had another polyp removal surgery thru the nose, that will make 4 all togather. PREDNISONE is the only thing that seems to work, I don't have to take high dossages, I take like 10 mg every 3 days maybe, but I still get side effects. Brusing, mood swings, itching, One wierd thing is the thinning of the skin that shows my scaring from the bi craninomy really bad. You can actually see the outlining of the brackets and screws where they put my skull back togather.
I need another surgery where the doctor has told me that the bony tissue that seperates the brain from the sinius' behind the eyes may be gone from the polyps eating away over a period of time, and they may have to open my head again, It really scared me so I didn't follow back up with the doctor and got some more prednisone from a primary care visit that I claimed that I have a sinius infection. It will carry me for a couple of months. It has been 8 months since I seen that doc that wants to open my head again (same doctor)this is a specialist from Duke Hospital in North Carolina. I'm doing ok with only 10mg every 2 to 3 days. Problem is tring to keep getting prednisone from doctor to doctor.