Any emotions that generate frequencies under 200 hz are considered to be in the low frequency range.
Low emotional frequencies stored in the body compromise the quality of your internal atmosphere by producing irregularities, imbalances, or blockages in your energy system.
These irregularities, imbalances, or blockages will flip your internal switch from healing mode to stress mode and show up in your life as an issue of some sort.
These emotions are a normal part of the human experience but are toxic when stored for long periods of time.