Immune Issues
Autoimmunity — There are over 100 Autoimmune Conditions and 40 other diseases that have a known autoimmune component. Autoimmune conditions are characterized by an overactive immune response and chronic inflammation.
Inflammatory Bowel Diseases (IBD)
Crohn's Disease is an inflammatory response that attacks the entire GI tract —especially the connection between the large and small intestine —causing redness, pain, and swelling.

Ulcerative Colitis is similar to Crohn's, but only affects the large intestine (a.k.a. your colon). Symptoms of Crohn's & UC are:
Abdominal Pain
Diarrhea
Rectal Bleeding
Weight Loss
Fever