Dreaming is normal - some of us may remember more and some less. In some cases, when an individual has frightening dreams (nightmares), the individual may have disturbed sleep and that may be concerning, however, in general if the sleep is not disturbed on a routine basis and there is no physically aggressive activity associated with the dreaming, excessive dreaming is not a concern. If you do have excessive nightmares that disturb your sleep on a regular basis leading to daytime tiredness, you might want to talk to a physician specializing in sleep medicine for more help and possibly prescription of medications that might help in this regard.