Enrique Iglesias -- I Need a Hand ... From a Surgeon!

That drone accident jacked up Enrique Iglesias' hand so badly he has to get reconstructive surgery.

Enrique's fingers got sliced during Saturday night's concert in Tijuana when he grabbed a drone flying above the stage. Even though the singer was able to finish the show -- bloody and bandaged ... the damage was severe.

His rep told the AP ... Enrique was having surgery in L.A. on Monday to repair his right hand.

His world tour will resume July 3rd in Mexico City, where we're guessing drones will be strictly prohibido.