Trigger points can be implicated in a wide range of common conditions that involve chronic pain, including sciatica, plantar fasciitis, low back pain, trigger finger and frozen shoulder, to name a few.

Trigger points are defined as “a focus of hyper-irritability in a tissue that, when compressed, is locally tender and, if sufficiently hypersensitive, gives rise to referred pain and tenderness.

Trigger points are typically caused by three types of muscle overload: acute, sustained and repetitive. These types of muscle overload can occur in a variety of settings, including occupational and athletic settings, and can also result from underlying pathologies.

– American Massage Association