Symptoms of Phobia

These are some of the symptoms of phobia:

• Sensations of fear or anxiety that are excessive, unjustified, or persistent that is brought on by a specific thing, activity, or circumstance.
• Feelings are either irrational or exaggerated in relation to any actual threat. While anyone can be scared of an unrestrained, menacing dog, most people do not flee from a calm, quiet animal on a leash.
• avoidance of the object, activity, or situation that causes the phobia People with phobias are frequently ashamed or embarrassed about their symptoms because they recognize that their fears are exaggerated. To avoid anxiety symptoms or embarrassment, they avoid the phobia's triggers.
• Physical manifestations of anxiety. Tremors, palpitations, sweating, shortness of breath, dizziness, nausea, and other symptoms that reflect the body's "fight or flight" response to danger are examples. (Symptoms such as these may lead to a diagnosis of panic disorder.)

References 

[1] https://www.health.harvard.edu/a_to_z/phobia-a-to-z