Muscle pain below left thumb. A little bit of background: I am a beginner, started playing bass about 3 months ago, but have been playing guitar (and banjo) for the past 20 years. The pain started several days ago following a quite extensive practice session (4 hours), but doesn't seem to go away even though I basically stopped playing (less than 30 min a day).
cheers,
Gregorski
cheers,
Gregorski