nettlesome
adjective
Definitions
(of a person, thing, situation, etc.) Causing irritation, annoyance, or discomfort; bothersome, irksome.
Example: My poison ivy rash is very nettlesome.
(of a task, problem, etc.) Thorny; difficult to deal with, especially due to being complex or tricky.
Example: Be careful what you say to him; he's a nettlesome fellow.