Breast reconstruction is one of the main components of breast cancer treatment. Its purpose is to restore the natural shape of the breast, which has a positive effect on the patient’s quality of life. Reconstruction using flaps of own tissue today represents the "gold standard" in breast reconstruction. In addition to a favorable aesthetic result, it was discovered that it is possible to achieve almost normal sensation in the reconstructed breast which also has an positive impact on the patient. Reinnervation is possible by spontaneous nerve ingrowth or microsurgical reattachment. The purpose of this paper was to evaluate the quality of breast reinnervation after free flap reconstruction by examining relevant studies. Research has shown that sensory recovery is variable and relatively unpredictable, due the diversity of the assessment methods and the time of their application. Despite the aforementioned heterogeneity of previous studies, it was shown that flaps innervated by surgical coaptation of nerves lead to more favorable outcomes compared to non-innervated ones, which manifests in earlier onset and gradual recovery of sensation with a greater chance of final return to pre-mastectomy level. Due to the lack of standardization of tests for objective assessment of breast sensation recovery after reconstruction, this issue is still unresolved. Larger studies, which could highlight the importance of reinnervation as well as differences in quality of reinnervation after reconstruction with different free flaps, are needed.