Food intolerance has been found associated with irritable bowel syndrome and inflammatory bowel disease,[14] chronic constipation,[15] chronic hepatitis C infection,[16] eczema,[17] NSAID intolerance,[18] respiratory complaints,[19] including asthma,[20] rhinitis and headache,[21][22] functional dyspepsia,[23] eosinophilic esophagitis[11] and ENT illnesses.[21][24]