Dreaming of opening a padlock is both positive and negative sign as per dream meaning and interpretation. The dream means you will find solution to a pestering problem. It also means success. Dreams of padlock also mean you finding secrets about someone and it will open up a huge problem in life. It also means you will find out about something that was hidden from you.
Dream of opening a padlock and you are doing it in the dream means you will open things that were closed for a longtime. It also means discovering new information or finding out about a family secret.
Dreams of opening a padlock and you are not seen in the dream means you will be investigated for something. It also means in your absence someone attempting to find out your secrets or things you have hidden.
Dreaming of opening a padlock and it is not getting opened means you will make several unsuccessful attempts to achieve something. It also means frustration.