Continuity: Length of the ash on the joint that Renton and Dianne share after Renton visits Tommy.
Continuity: The amount of beer on Begbie's shirt after making the heroin deal.
Revealing mistakes: When Begbie strikes the seated man with the pool cue, he clearly hits the seat. The back of the chair is covered by the man's jacket and the cue hits the chair underneath the jacket.
Continuity: The pants Renton is wearing when he's about to have sex with Diane, are not the same as he wears the morning after, following her to school.
Errors in geography: When Diane meets Spud lying comatose on the street, a bus passes by in the background. The bus is orange, which is the colour of Glasgow City buses, but the movie is set in Edinburgh where the buses are maroon and cream.
Continuity: When Renton, Spud, Begbie and Sick Boy go to London they get their room. The sink in the room does not have a mirror above it. Later, Renton runs water in the sink and looks into the mirror while deciding about running off with the money.
Continuity: When Mark leaves the money for Spud, it is in the middle of the locker and parallel to the locker walls, but when Spud retrieves it the money is crooked and off-center.
Crew or equipment visible: When Renton is in his bedroom being forced off heroin by his parents and the baby is crawling across the roof towards him after Sickboy has made an appearance, there is a close-up shot of Renton cowering against the pillow. The shadow of the camera is visible against his face and the pillow.
Errors in geography: Although the film is set in Edinburgh, you can clearly see the Campsie Fells that are situated to the north of Glasgow, 50 miles away.
Continuity: At the beginning, Rents runs on Adidas shoes. One shot later, he runs on Converse Allstar shoes.
Continuity: After Renton has sex with the girl, he has nothing on his penis, but once he gets kicked out into the hallway, we see him pull a condom off.
Continuity: The suppositories disappear and then reappear in Renton's hands when he is swimming.
Continuity: During the drug transaction in the hotel room towards the end of the film, the guy who enters the back-room with Keith Allen never reappears before the boys start celebrating their windfall.
Crew or equipment visible: When Renton is in bed screaming covering his ears, the shadow of the camera is visible.