This is incomplete and needs more... I hope this helps being that I experience extreme symptoms and can always add more but, these are musts for me because this flu/allergy stuff is just the beginning and mild but can get the point where I cannot sweat or regulate temp at all. When things get extreme, cognitive, acute pain and muscle tension become the worst.
Digestive: Heartburn, Cramps, Vomiting, trouble swallowing
General flue like: migranes, inability to sweat/fluid retention
Allergic: swelling of skin and tissue, skin rashes, asthma
Cognitive: tinnitus, ticks, confusion, neruopathy, mania/mood swings, delusional though and numbness
Pain: Anal/rectum, spinal, and pelvic floor
hope this helps