Raynaud's phenomenon

/ɹeɪnˈɔːdz fɪnˈɒmɪnən/

/ɹeɪnˈɔːdz fɪnˈɑːmɪnən/

a condition characterized by episodic narrowing of the blood vessels in the fingers and toes, resulting in reduced blood flow and color changes in the affected areas