Clearly, not everyone with a rotator cuff tear complains of painful symptoms. However, in many individuals, a rotator cuff tear can cause significant disability, and prompt diagnosis and treatment can profoundly improve symptoms.
Yamaguchi K, et al. "The demographic and morphological features of rotator cuff disease. A comparison of asymptomatic and symptomatic shoulders." J Bone Joint Surg Am. 2006 Aug;88(8):1699-704.