Ablutophobia

 Ablutophobia (from Latin ablutere 'to wash off") is the persistent, abnormal and unwarranted fear of bathing, washing, or cleaning. This phobia is a situational specific phobia.  Ablutophobia tends to be more common in children and women than in men. However, the fear generally dissipates in children as they learn that bathing is not something to be feared.

Symptoms
The symptoms of Ablutophobia as well as many specific phobias are as follows:
 * Feelings of panic, dread, horror, or terror
 * Recognition that the fear goes beyond normal boundaries and the actual threat of  danger
 * Reactions that are automatic and uncontrollable, practically taking over the person’s thoughts
 * Rapid heartbeat, shortness of breath, trembling, and an overwhelming desire to flee the situation—all the physical reactions associated with extreme fear
 * Extreme measures taken to avoid the feared object or situation.

https://en.wikipedia.org/wiki/Ablutophobia