Sims do not automatically know they have "Crabs" without taking action. You can manage the condition through the following steps:
: Infected Sims will experience a persistent "Itchy" moodlet. This often results in a Tense or Uncomfortable emotional state, causing them to frequently scratch themselves. WooHoo Crabs - WonderfulWhims
In the mod for The Sims 4 , "WooHoo Crabs" is a simulated minor illness (STC - Sexually Transmitted Condition) that characters can contract through unprotected intimacy. Condition Overview Sims do not automatically know they have "Crabs"
: Utilizing condoms during WooHoo (available in the WonderfulStore) significantly reduces the risk of transmission to near zero. In the mod for The Sims 4 ,
: Sims with high "Pue" or hygiene-related traits may be more cautious. Checking a partner's health status before intimacy is the only sure way to avoid the moodlet without protection.