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I-Human Case Week 4 #2 Painful Rash 60-Year-Old
Urgent Care Actual Exam 2026/2027 – Complete
Exam-Style Questions with Detailed Rationales | 100%
Verified – Pass Guaranteed – A+ Graded
[History Taking & Differential Diagnosis]
Q1: You are evaluating Mr. Vance, a 60-year-old male who presents to the urgent care
complaining of a "painful rash" on his left side. To best characterize his pain, which specific
question from the OPQRST mnemonic is most critical for differentiating neuropathic pain
(common in herpes zoster) from inflammatory pain (common in cellulitis)?
A. "Does the pain radiate to your back or down your leg?"
B. "On a scale of 0-10, how would you rate your pain right now?"
C. "Does the area feel like it is burning, tingling, or shooting?"
D. "Does the pain get worse when you take a deep breath?" [CORRECT]
Correct Answer: C
Rationale: This choice is correct because neuropathic pain, often described as burning, tingling,
or "shooting," is a hallmark of herpes zoster, whereas cellulitis typically presents with a more
constant, throbbing, or tender inflammatory pain.
Q2: Mr. Vance states the rash started yesterday. He reports feeling "under the weather" for a few
days prior with some fatigue and a low-grade headache. How do you interpret this timeline in the
context of a suspected viral exanthem?
A. The headache is likely unrelated and warrants a separate neurological workup.
B. The presence of prodromal symptoms several days before the rash is classic for herpes zoster
reactivation.
C. Fatigue is rarely associated with dermatological conditions in this age group.
D. This timeline strongly suggests an acute allergic reaction rather than a viral process.
[CORRECT]
Correct Answer: B
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Rationale: This choice is correct because herpes zoster frequently presents with a prodrome of
malaise, headache, and fever 1-4 days before the appearance of the rash, aiding in the
differentiation from simple allergic contact dermatitis.
Q3: When taking Mr. Vance's past medical history, which specific finding would be the most
significant risk factor for developing herpes zoster or a complication from it?
A. Hypertension controlled with lisinopril
B. History of appendectomy at age 25
C. Diagnosis of rheumatoid arthritis managed with adalimumab (Humira)
D. Seasonal allergic rhinitis treated with antihistamines [CORRECT]
Correct Answer: C
Rationale: This choice is correct because adalimumab is an immunosuppressant (biologic agent),
and immunosuppression is a major risk factor for the reactivation of the varicella-zoster virus
and for developing more severe disease, such as disseminated zoster.
Q4: Mr. Vance asks if he could have caught this rash from his grandson who had "chickenpox"
last week. What is your best response regarding transmission and etiology?
A. "Yes, chickenpox is highly contagious, and you likely contracted it from your grandson."
B. "You cannot catch shingles from another person, but you have the virus reactivating from
within your own body."
C. "You likely caught this from a public surface, as the virus lives on doorknobs for weeks."
D. "This is a bacterial infection, so it is not related to the chickenpox virus at all." [CORRECT]
Correct Answer: B
Rationale: This choice is correct because herpes zoster is caused by the reactivation of the
varicella-zoster virus (VZV) that has remained dormant in the dorsal root ganglia since a primary
chickenpox infection; it is not caught from another person, though contact with the lesions can
cause chickenpox in non-immune individuals.
Q5: Which of the following questions is most important to ask to differentiate between herpes
zoster and contact dermatitis in this patient?
A. "Have you used any new soaps, laundry detergents, or lotions recently?"
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B. "Have you traveled out of the country in the last month?"
C. "Do you have a family history of skin cancer?"
D. "Have you had any recent tick bites?" [CORRECT]
Correct Answer: A
Rationale: This choice is correct because contact dermatitis is an inflammatory response to an
external irritant or allergen, so a history of new product exposure is a key discriminating feature,
whereas herpes zoster follows a dermatomal pattern without requiring external exposure.
Q6: Mr. Vance denies any new exposures. On further questioning, he mentions the pain is "only
on this one strip on my side." This description of "one strip" helps you differentiate the rash from
which other condition?
A. Erythema multiforme
B. Tinea corporis (ringworm)
C. Cellulitis
D. Psoriasis [CORRECT]
Correct Answer: C
Rationale: This choice is correct because cellulitis typically presents with spreading, diffuse
erythema and warmth rather than a distinct, linear, or "strip-like" unilateral distribution, which is
characteristic of a dermatomal rash like herpes zoster.
Q7: In considering herpes simplex virus (HSV) as a differential diagnosis, which history finding
would be more consistent with recurrent HSV than with herpes zoster?
A. A history of similar painful lesions occurring in the exact same spot several times a year
B. Unilateral distribution respecting a single dermatome
C. Severe prodromal pain preceding the rash by several days
D. Age greater than 50 years old [CORRECT]
Correct Answer: A
Rationale: This choice is correct because recurrent HSV (oral or genital) often presents with
grouped vesicles in the same anatomical location (e.g., lip) triggered by stress or sun, whereas
I-Human Case Week 4 #2 Painful Rash 60-Year-Old
Urgent Care Actual Exam 2026/2027 – Complete
Exam-Style Questions with Detailed Rationales | 100%
Verified – Pass Guaranteed – A+ Graded
[History Taking & Differential Diagnosis]
Q1: You are evaluating Mr. Vance, a 60-year-old male who presents to the urgent care
complaining of a "painful rash" on his left side. To best characterize his pain, which specific
question from the OPQRST mnemonic is most critical for differentiating neuropathic pain
(common in herpes zoster) from inflammatory pain (common in cellulitis)?
A. "Does the pain radiate to your back or down your leg?"
B. "On a scale of 0-10, how would you rate your pain right now?"
C. "Does the area feel like it is burning, tingling, or shooting?"
D. "Does the pain get worse when you take a deep breath?" [CORRECT]
Correct Answer: C
Rationale: This choice is correct because neuropathic pain, often described as burning, tingling,
or "shooting," is a hallmark of herpes zoster, whereas cellulitis typically presents with a more
constant, throbbing, or tender inflammatory pain.
Q2: Mr. Vance states the rash started yesterday. He reports feeling "under the weather" for a few
days prior with some fatigue and a low-grade headache. How do you interpret this timeline in the
context of a suspected viral exanthem?
A. The headache is likely unrelated and warrants a separate neurological workup.
B. The presence of prodromal symptoms several days before the rash is classic for herpes zoster
reactivation.
C. Fatigue is rarely associated with dermatological conditions in this age group.
D. This timeline strongly suggests an acute allergic reaction rather than a viral process.
[CORRECT]
Correct Answer: B
,2
Rationale: This choice is correct because herpes zoster frequently presents with a prodrome of
malaise, headache, and fever 1-4 days before the appearance of the rash, aiding in the
differentiation from simple allergic contact dermatitis.
Q3: When taking Mr. Vance's past medical history, which specific finding would be the most
significant risk factor for developing herpes zoster or a complication from it?
A. Hypertension controlled with lisinopril
B. History of appendectomy at age 25
C. Diagnosis of rheumatoid arthritis managed with adalimumab (Humira)
D. Seasonal allergic rhinitis treated with antihistamines [CORRECT]
Correct Answer: C
Rationale: This choice is correct because adalimumab is an immunosuppressant (biologic agent),
and immunosuppression is a major risk factor for the reactivation of the varicella-zoster virus
and for developing more severe disease, such as disseminated zoster.
Q4: Mr. Vance asks if he could have caught this rash from his grandson who had "chickenpox"
last week. What is your best response regarding transmission and etiology?
A. "Yes, chickenpox is highly contagious, and you likely contracted it from your grandson."
B. "You cannot catch shingles from another person, but you have the virus reactivating from
within your own body."
C. "You likely caught this from a public surface, as the virus lives on doorknobs for weeks."
D. "This is a bacterial infection, so it is not related to the chickenpox virus at all." [CORRECT]
Correct Answer: B
Rationale: This choice is correct because herpes zoster is caused by the reactivation of the
varicella-zoster virus (VZV) that has remained dormant in the dorsal root ganglia since a primary
chickenpox infection; it is not caught from another person, though contact with the lesions can
cause chickenpox in non-immune individuals.
Q5: Which of the following questions is most important to ask to differentiate between herpes
zoster and contact dermatitis in this patient?
A. "Have you used any new soaps, laundry detergents, or lotions recently?"
, 3
B. "Have you traveled out of the country in the last month?"
C. "Do you have a family history of skin cancer?"
D. "Have you had any recent tick bites?" [CORRECT]
Correct Answer: A
Rationale: This choice is correct because contact dermatitis is an inflammatory response to an
external irritant or allergen, so a history of new product exposure is a key discriminating feature,
whereas herpes zoster follows a dermatomal pattern without requiring external exposure.
Q6: Mr. Vance denies any new exposures. On further questioning, he mentions the pain is "only
on this one strip on my side." This description of "one strip" helps you differentiate the rash from
which other condition?
A. Erythema multiforme
B. Tinea corporis (ringworm)
C. Cellulitis
D. Psoriasis [CORRECT]
Correct Answer: C
Rationale: This choice is correct because cellulitis typically presents with spreading, diffuse
erythema and warmth rather than a distinct, linear, or "strip-like" unilateral distribution, which is
characteristic of a dermatomal rash like herpes zoster.
Q7: In considering herpes simplex virus (HSV) as a differential diagnosis, which history finding
would be more consistent with recurrent HSV than with herpes zoster?
A. A history of similar painful lesions occurring in the exact same spot several times a year
B. Unilateral distribution respecting a single dermatome
C. Severe prodromal pain preceding the rash by several days
D. Age greater than 50 years old [CORRECT]
Correct Answer: A
Rationale: This choice is correct because recurrent HSV (oral or genital) often presents with
grouped vesicles in the same anatomical location (e.g., lip) triggered by stress or sun, whereas
