A nugget of marijuana against a coppery background. The name of the cannabis strain is Blue Dream. This strain of cannabis is particularly known for its pain-relieving ability, and is prized by sufferers of migraine and cluster headaches. This photo is from Michigan, where medical marijuana laws allow the sick and injured to use marijuana to treat a number of illnesses and ailments, based on a doctor's recommendation. The horizontal photo features a copper-colored background and there is ample space above, below and on the sides for ad copy or text.