What does it mean when you dream about an egg?

Illness in your family.

Dreams communicate symbolically, but it is nearly impossible to provide any meaningful interpretation from a single symbol isolated from the context and other elements in a dream. Very generally, eggs symbolize new life or the potential for new life or regeneration. In some traditional cultures, colored eggs are presented to newly weds to represent the hope of fertility. In Western Culture, a "nest egg" represents money set aside for some future use such as buying a house (nesting.) In any case, dreaming of an egg has no relationship at all to family illness.