A myxoid cyst, also called a digital mucous cyst, is identified by the clear mucous that fills it.
It’s a firm, smooth, rounded bump on the skin, often having a bluish tint. Inside, it is filled with clear, sticky, gelatinous fluid. The cysts appear most often on the fingers but can also show up on the toes. The myxoid cyst generally occurs in the proximal nail fold.