Modifiers matching upset:

• emotional,
• gastrointestinal,
• minor,
• haematological,
• vague,
• intestinal,
• gastric,
• gi,
• digestive,
• internal,
• persistent,
• physical,
• metabolic,
• common,
• mental,
• systemic,
• operational,
• somatic,
• political,
• severe,

Simple categories matching persistent:

• discomfort,
• headache,
• material,
• symptom,
• condition,
• retrovirus,
• abnormality,
• infection,
• bacteria,
• pesticide,
• pathogen,
• disease,
• aggression,
• dirt,
• compound,
• circumstances,
• information,
• organophosphate,
• affliction,
• injury,
• state,
• substrate,
• problem,
• cause,
• contaminant,
• illness,
• chemical,
• substance,
• consequence,
• event,
• virus,
• instability,
• metal,
• difficulty,
• volatile,
• upset,
• complaint,
• matter,
• organism,
• pollutant,
• mineral,
• disorder,
• insecticide,
• herbicide,
• distress,
• lesion,
• time,
• pain,