Lichen planus symptoms and conditions

My 7 year old son has been on Singulair since this spring for a dry hacking cough and allergies. The Singulair worked great clearing up his symptoms. We have not seen any behavioral changes. Our doctor said he only needs to take it during fall and spring when his allergy induced asthma is the worst. Both times that I have taken him off of it for a seasonal reprieve he has developed a VERY PAINFUL STOMACH ACHE. He doesn't vomit, but he rolls around complaining that his tummy hurts. I have seen other posts concerning stomach aches when on the medication, but I am wondering if anyone else has had this experience when they went off of it. Even if he forgot his medication a couple of days, the stomach ache will present.

Has anyone had a problem with mouth or tongue sores? My oral surgeon elimnated anything serious, but still can't for sure tell me why the left side of my tongue is sore and red. Leiton planus was mentioned, I found that on one site to be associated with certain blood pressure medications.

I have been on prednisone ( for lichen planus) for about 6 weeks starting with 20 mg twice a day for a month. Now I am taking half a pill once a day... My face and neck are SO swollen I have gained So much wait I have mental and emotional breakdowns all the time I can't sleep ( so the doc prescribed seroquil) now I don't know if I am coming or gong. I will be so very full and still shoving food in my mouth. My knees and legs hurt badly I have had a horrible headach and my teeth and mouth hurt and now 'm growing facial hair at 27 yrs old. HELP ME!

I am seeing my doctor today because of what I think are Lipitor side effects:
Leg pain, loose stools, itchy skin, lichen planus, continuous hum in the right ear, occasional 'off kilter' feeling. I have had various tests with no identifying results.

I'll do a write up of the doctor's response.

Lichen planus? Age 62, and only after starting lipitor, developed sores in mouth and on tongue, requiring biopsy. A connection? I just thought of this possibility and will be contacting my physician tomorrow.