Active trigger points are common but not universal with tension-type headache: Pain features rather than...

Area of Science:

• Neurology
• Pain Medicine
• Musculoskeletal Research

Background:

• Active trigger points (ATrPs) are a common nociceptive source in tension-type headache (TTH).
• Understanding distinct features of TTH patients with varying numbers of ATrPs is crucial for targeted treatment strategies.

Purpose of the Study:

• To identify subgroups of TTH patients based on the number of ATrPs.
• To compare headache characteristics, psychological and behavioral factors, pain distribution, and musculoskeletal function between these subgroups.

Main Methods:

• A secondary analysis of a cross-sectional study involving 80 TTH participants.
• Assessment included cervical musculoskeletal tests, quantitative sensory testing (QST), pericranial tenderness, and identification of ATrPs.

Main Results:

• Two clusters emerged: few/nil ATrPs (n=48) and multiple ATrPs (n=32).
• The multiple ATrP group reported longer headache history, more neck pain, more painful body areas, and increased pain during cervical testing.
• No significant differences were observed in psychological/behavioral features or QST between the groups.

Conclusions:

• Limited features distinguish TTH individuals with multiple ATrPs from those with fewer.
• ATrPs may relate to pain hypersensitivity rather than direct musculoskeletal dysfunction.
• Further research is necessary to elucidate the role of ATrPs in TTH.