This means unconformity with the environment which surrounds you. Dreaming about other people with skin rash may mean you’re afraid to have any inconvenient in the activities you’re performing while searching for success. To dream about urticaria signifies that selfish interests want to manipulate you. When a woman dreams about skin rash, then it means that she’s surrounded with disreputable people.

(Allergic disorder | Rash | Urticaria) A blood disease that manifests through breaking out of the skin with red spots. If seen in a dream, it means fast richness, money spent in celebrating a wedding, the outrage of injustice, or expediting a punishment.

…When we deal with a volcanic eruption: the volcano symbolizes a sudden mutation of real life and the long-repressed passions that can get to explode with all virulence. If we manage to tame these passions they become a source of spiritual life. If it’s a skin rash, then the dream announces fears, concerns and problems painful to bear….