clear vesicle

Small, clear vesicles initially form individually, then merge and become cloudy.

Quickly, a clear vesicle arises on this erythematous base.

Skin changes begin with an erythematous maculopapular rash, followed by the appearance of clear vesicles and accompanied by pain (which might be severe).

It is an acute, chronic, or recurrent dermatosis of the fingers, palms, and soles, characterized by a sudden onset of many deep-seated pruritic, clear vesicles; later, scaling, fissures and lichenification occur.

While I wasn't exactly happy about this, it was interesting to see what happened; the tip of the Plexaurelia branch which had landed in the mushroom polyps developed blister-like clear vesicles, the whole animal kept inflating and deflating itself more frequently than usual, and after about a week collapsed completely.