There is a difference. For example, this sentence would make sense. The patient's constant smoking aggravated his lungs, exacerbating his asthma, and causing deterioration in his clinical status. The are medical terms used in very specific meanings that a layperson in an English speaking country may not even know the difference in.

exacerbate = to increase the severity, bitterness, or violence of (disease, ill feeling, etc.); aggravate, to embitter the feelings of (a person); irritate; aggravate = to make worse or more severe; intensify, as anything evil, disorderly, or troublesome: to aggravate a grievance; to aggravate an illness. to annoy; irritate; exasperate: His questions aggravate her. to cause to become irritated or inflamed: The child's constant scratching aggravated the rash. deteriorate = to make or become worse or inferior in character, quality, value, to disintegrate or wear away.

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exacerbate and aggravate are inter changeable in the general language(synonyms) deteriorate = something which is already bad and is now getting worse.