The spots appear when the blood is congested with a bandage on the upper arm, e.g. with a blood pressure cuff. The spots also appear when the arms are slightly raised from the trunk (angle approx. 45°) and disappear again when the arms are stretched upwards.
Bier spots
Forchheimer spots
Elschnig spots
Bitot's spots
Koplik's spots
Fuchs spot
Fordyce spots
Brushfield spots