Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Pimples in a dream are wealth. If they are on the face, they are debts. The exit of their contents is payment of the debt.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Pimples indicate worries. Whoever sees pimples on his body will be afflicted with worry proportional to them.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Pimples are interpreted as wealth. Whoever sees them appear on his hand will gain wealth.