Seeing an arm is interpreted as strength, power, skill, craft, wealth, and blessing.
Seeing one's arm strong, sound, and firm signifies skill and craft, power and strength, and wealth and property.
Imam al-Nabulsi said that the arms seen in a dream signify the dreamer's two friends, close brothers, mature children, or two suitable partners from whom he benefits and upon whom he relies.
Seeing a person with short arms signifies that the man is brave, generous, and self-admiring.
Seeing one's arm disabled and weak to the point of uselessness, or short and deficient, signifies deficiency and deprivation in strength and power, craft and skill, and wealth and property. Conversely, seeing one's arm thick, sinewy, and covered with hair signifies success in undertakings and crafts. A hairy arm is better for a man but is not considered good for a woman.
Seeing one arm long and the other short signifies receiving good and benefit from one of two people in whom one places hope, but receiving no benefit from the other.