Here are just a few of the extremely wide range of symptoms parasites can cause:

Indigestion, diarrhea, constipation, bloating, gas, nausea, anal itching, heart burn, acid reflux, ulcers, colitis, Candida, insufficient absorption of food, abdominal pain, heart trouble, weight loss, weight gain, hunger, joint and muscle pain, arthritis, acne, eczema, rashes, skin disorders, fatigue, anxiety, sleeping trouble, teeth grinding, neurological disorders, recurring colds, allergies (a big one), sinus trouble, weakened immune system, asthma, liver damage, liver trouble, anemia (major one), hair loss (major one), and dark circles under eyes.

I have a very weak sense of smell and chronic sinusitis. I saw many doctors about it over the years without any results. I never was told it might be due to parasites. Are there over the counter cures for parasites?