Psychological level
We find that craving is the underlying root of unhappiness, sorrow, grief, fear, worry, and disapointment. Craving gives rise to sorrow when we are separated from the persons or things we are attached to. Also it gives rise to fear, we become afraid of losing what we have obtained, we are afraid that people might reject us or that circumstances might separate us.

There are several stages in the psychological process by which craving leads to Dukkha. They are as follows;

(a)     The very moment craving arises it brings along with it a feeling of dissatisfaction. This arises due to the contrast between one's present state of lack-of oneself without the object-and the possibility of fulfilling oneself by possession of the object. This is the Dukkha of striving and seeking.

(b)     In the enjoyment of the object
The enjoyment of the object is accompanied by the suffering of protection. Once we get an object we have to protect it.

(c)    Loss of the object
With the break up of an object or loss of a loved one there is suffering of deprivation.

If we examine our mind carefully we find that simply yielding to desire brings us only temporary satisfaction, which actually fuels the force of craving. Craving arises more strongly in the future. We need more money, more pleasure, more power. Thus it brings a stronger inner dissatisfaction. This is the way craving becomes the origin of suffering at the psychologicl level.