Dreaming of a hand being cut off signifies that you may be failing to accomplish important tasks or lacking essential needs in your life. It can indicate that you are having to rely on others for help, or that something is occurring in your life that is disconnecting you from your responsibilities. Such dreams may reflect a lack of self-confidence and self-sufficiency.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Scission" (page 376) â resolved via the equivalent "Cutting off" entry.
Cutting off one's hand in a dream signifies failure to perform one's obligatory prayers or being devoid of any need or an income that eliminates the need to ask others for anything, or it could mean repentance from sin. If one's hand and heels are cut off in a dream, it means corruption in one's religious life or forsaking the spiritual circles, or it could mean being barren or being freed from the duty to raise children. Cutting off one's nose or ear in a dream means a punishment for a crime, or it could mean poverty or missing someone's news. Cutting off one's tongue in a dream means invalidating one's argument or proof, or it could mean preventing him from asking for anything. If one sees himself dismembered in a dream, then it means that he will undertake extensive travels, or that members of his family will disperse into different locations, or it could mean severing one's blood ties or paying a penalty. (Also see Beheading; Rupture of relations)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.