**Patient Name:** Rizvi Mahmud Plabon  
**Age:** 33  
**Gender:** Male  
**Medical History:** Not specified (text appears as "dfgdfg")  
**Current Symptoms:** Painful red eye, joint pain, painful rash on leg

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### 1. Potential Differential Diagnoses

**a. Reactive Arthritis (Reiter’s Syndrome)**
- Classic triad: conjunctivitis/uveitis (painful red eye), arthritis (joint pain), and mucocutaneous lesions (rash).
- Often follows genitourinary or gastrointestinal infection.

**b. Disseminated Gonococcal Infection**
- Can present with migratory polyarthritis, tenosynovitis, skin lesions (pustular or vesicular rash), and sometimes conjunctivitis.

**c. Psoriatic Arthritis**
- May present with joint pain and psoriatic skin lesions, which can be painful. Ocular involvement (uveitis) is possible.

**d. Systemic Lupus Erythematosus (SLE)**
- Can present with joint pain, skin rash (often malar, but can be elsewhere), and ocular involvement.

**e. Vasculitis (e.g., Behçet’s Disease)**
- Can present with painful oral/genital ulcers, uveitis, arthritis, and skin lesions.

**f. Septic Arthritis with Associated Cellulitis**
- If the rash is more consistent with cellulitis, and there is joint pain and red eye (possibly from bacteremia).

**g. Erythema Nodosum with Associated Systemic Disease**
- Painful nodular rash (often on shins), joint pain, and sometimes ocular involvement (seen in sarcoidosis, IBD, infections).

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### 2. Recommended Diagnostic Tests

- **Basic Blood Work:** CBC, ESR, CRP
- **Autoimmune Panel:** ANA, RF, HLA-B27
- **Infectious Workup:** Urethral/cervical swab, urine PCR for Chlamydia/Gonorrhea, blood cultures if febrile
- **Joint Aspiration:** If joint is swollen, for cell count, Gram stain, culture, and crystals
- **Skin Lesion Biopsy:** If diagnosis unclear
- **Ophthalmologic Evaluation:** Slit lamp exam to assess for uveitis, conjunctivitis, or scleritis
- **Imaging:** X-ray or ultrasound of affected joint(s) if indicated
- **Other:** Chest X-ray (if sarcoidosis or TB suspected)

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### 3. Urgency Level

**Medium to High**

- **High** if there is vision loss, severe eye pain, photophobia, or signs of septic arthritis (hot, swollen joint, fever).
- **Medium** if symptoms are stable but persistent; prompt evaluation is still warranted due to risk of vision loss and joint damage.

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### 4. Key Observations and Clinical Notes

- The combination of painful red eye, joint pain, and painful rash is suggestive of a systemic inflammatory or infectious process.
- The pattern is most consistent with a spondyloarthropathy (e.g., reactive arthritis) or a disseminated infection.
- Ocular involvement can be vision-threatening and requires urgent ophthalmology input.
- The nature of the rash (morphology, distribution) is important for narrowing the differential.
- Absence of detailed medical history is a limitation; further history (recent infections, sexual history, travel, systemic symptoms) is needed.

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### 5. Red Flags to Watch For

- **Ocular:** Sudden vision loss, severe photophobia, purulent discharge, inability to open eye
- **Joint:** Hot, swollen, erythematous joint (suggests septic arthritis)
- **Systemic:** High fever, hypotension, tachycardia (sepsis)
- **Skin:** Rapidly spreading rash, necrosis, bullae
- **Other:** Meningismus, altered mental status

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**Summary:**  
This patient’s constellation of symptoms is concerning for a systemic inflammatory or infectious process, with possible vision- and joint-threatening complications. Urgent evaluation, including ophthalmology and rheumatology/infectious disease input, is recommended. Immediate attention is required if any red flags are present.

**Note:** This analysis is for informational purposes only. A thorough clinical assessment by a healthcare professional is essential for diagnosis and management.