TRAUMA is a late entry in the career of Spanish horror director Leon Klimovsky. Like A DRAGONFLY FOR EACH CORPSE and BLUE EYES OF THE BROKEN DOLL, it's a Spanish-themed giallo, although the actual inspiration is much more obvious: like SISTERS before it, this is a film which owes its existence to Hitchcock's PSYCHO.
The setting is rural Spain and a slightly run-down boarding house occupied by the usual oddballs including a writer and a couple of sexed-up couples (well, it was the 1970s). Before long a series of brutal razor slayings are taking place, and the viewer is left wondering who's responsible. Well, not really; the identity of the killer is blindingly obvious from the outset, but this doesn't detract from the film's entertainment value. Brutal murders, violent flashbacks, and a sedate pace follow.
The huge bonus here is Klimovsky's exemplary direction; this is a guy who could take a low budget and always make his film look fantastic. A succession of effective establishing shots and an emphatic, low key score combine to give the whole film a sinister atmosphere. The photography is good enough to keep things interesting despite the slow pace and lack of action. The gore is a bit shoddy, but the film feels very brutal nonetheless, and the climax is worth waiting for.