Platy

[mogfighow]

hello there I am new to this forum and have just started keeping platies, for the last 2 days I have notice almost translucent patches on each side of their heads does anyone know what this is?

 

[WILDER]

Size of tank in gallons or litres.
How many fish and which type.
Water stats in ammonia,nitrite,nitrate, and ph.
How long has the tank been set up.
Bleached out patches can be parasite to bacterial.
Any signs of flicking and rubbing.