Fabry Disease is difficult to diagnose even with clear symptoms because many general practitioners and specialists have little to know experience with it due to its rarity.
My primary symptom was erythromelalgia (burning in my feet, hands, and ears/head)(nerve damage). I also have hypohidrosis (I don't sweat enough which can "trigger" the erythromelalgia). Other symptoms include kidney damage, corneal whirling, small red dots, and an apparent red irritation around the hair follicles of my upper legs.