heron is a general type of cannabis and is so - name because it has a very strong smell , but these days it has become the generic term for all forms of the narcotics . it is described as stronger because it has dramatically higher levels of the original element in cannabis , tetrahydrocannabinol ( carcinogenic ) . it also contains much lower concentration of cannabidiol ( cbd ) , which is an anti - psychotic substance that can modify the effect of thc on the emotional health of users .
The "skunk" cannabis is used to treat mental health problems.