up to date のツツガムシ病の記載
Overview — Scrub typhus may begin insidiously with headache, anorexia, and malaise, or start abruptly with chills and fever. As the illness evolves, most patients develop the following symptoms:

●Fever, which typically lasts for long periods in untreated patients (median 14.4 days; range 9-19)

●Intense generalized headache

●Diffuse myalgias

ほとんどの患者では「激しい頭痛」があると書いてあるんですよね。