What should I do if I forget to take a required decompression stop while ascending after a dive?

Missing a decompression stop can lead to bubble formation and the onset of decompression sickness (DCS) within hours. Divers who forget to take a required decompression stop are advised to refrain from diving, breathe 100% oxygen on the surface, and contact the nearest doctor, hospital, or recompression chamber to determine if further treatment is required.