Do you know what caused the condition? Usually there’s an expiration built into whatever applied it. If it’s a poison or a disease, then you’ll need to recover from it or get it cured. TL;DR: without knowing how it was applied, it’s hard to give you a really good answer. Without more information, @MadWorks is correct… use the restoration spell.

The Pathfinder Society will automatically take care of this for you during your downtime. You can see the rules on it in the Organized Play Guide.

The Pathfinder Society takes care of its members by removing most ongoing nonpermanent negative conditions and repairing agents’ damaged gear to the condition it was in at the start of the scenario.

The following conditions are not automatically removed and must be cleared from the character before the end of the adventure or the character ceases to be available for organized play:

• Death
• Permanent negative effects, including polymorph or petrification
• Curses

Note that repairing damaged gear does not include resupplying consumables such as ammunition, potions, or talismans.