OpenHealth Q&A

Understanding Elevated CK Levels: The Mystery of Myositis or Other Underlying Issues?

Age: 25 | Height: 5'7" | Weight: 145 lbs My doctor has raised the possibility of myositis. Could this truly be the case? **Current Health Concerns:** - Ehlers-Danlos syndrome - POTS (Postural Orthostatic Tachycardia Syndrome) - Gastroparesis - Endometriosis **Previous Surgeries:** - Cystectomy (left side) in 2020 - Cystectomy, oophorectomy, and salpingectomy (left side) in 2025 **Medications:** - Metoclopramide - Dienogest - Bisoprolol - Mirabegron - Lemborexant - Tramadol - Vitamin B12 injections - Iron infusions Since 2023, I have been monitoring my creatine kinase (CK) levels, which have persistently shown elevation. What could potentially lead to these heightened levels? Doctors have ruled out rhabdomyolysis—what other factors might be at play? On average, my CK is about 400, but there have been several alarming spikes. In September 2023, my CK soared to over 7,000, prompting a hospital admission despite the absence of any symptoms like weakness or dark urine. This surprised the medical team, and aside from elevated CK, all other lab tests (including liver, kidney, CRP, creatinine, and electrolytes) appeared normal. The initial physician contemplated a muscle biopsy, yet the subsequent doctor deemed it unnecessary. Recently, however, I’ve experienced troubling leg weakness. During walks, it felt as if my quadriceps and knees lacked stability, leading to a few stumbling episodes. The following day, I endured severe pain in my quadriceps and left hip/glute area—an intense cramping sensation. That night, I was unable to bend my left knee, and any attempt to bend my right knee resulted in sharp pain. Walking now has become a challenge as my left knee remains stiff, making stair navigation impossible. Transitioning from sitting to standing engenders significant discomfort, although my urine remains clear. Feeling alarmed, I sought a same-day appointment at my university clinic. Despite a high pain threshold, I felt this pain was abnormal, impacting both my sleep and movement. When the doctor examined my thighs, it provoked tears and trembling due to the agony. I managed to push against her hand with my right thigh, albeit with substantial discomfort; my left thigh, however, would not respond at all. Blood tests and a urine sample were collected during my visit. Today, the physician reached out to inform me that my bloodwork was largely normal, with the exception of CK, which stood at 5,000. Given my medical background, she suggested a referral to a rheumatologist, expressing concerns about potential myositis or similar conditions. To clarify, I have engaged in weightlifting intermittently for years. Nonetheless, my CK levels remain elevated even during periods of inactivity, like the present. To help manage my POTS, I consume approximately 4-5 liters of water daily and often use liquid IV once a day. Is myositis a possible diagnosis? If it’s ruled out, what alternative explanations exist? I previously consulted with a rheumatologist regarding Ehlers-Danlos syndrome, but our interaction was limited to the Beighton scale assessment, and I did not follow up with him again. For your reference, I have undergone extensive examinations, revealing little of significance except for an ANA count of 1:640 (with other rheumatological panels returning negative), a consistent low lymphocyte count, and blood and protein markers in my urine. Throughout my life, I have suffered from joint pain that frequently resulted in hospital visits during my childhood due to severe episodes. Since 2020, I have experienced almost daily fevers, typically at a low grade around 37.8°C, but occasionally reaching as high as 38.7°C. My resting heart rate hovers around 120 BPM, which is typical for me. Additionally, I frequently have muscle spasms lasting hours, particularly beneath my left rib and in my left thigh. My hands exhibit significant tremors, especially when grasping objects, and doctors have noted a similar tremor in my tongue. I also experience transient red rashes on my chest and shoulders, aggravated by warmth, alongside petechial rashes on my thighs and calves after limited sun exposure. I’ve tested negative for myasthenia gravis. Although I enjoy weightlifting, there are many times I feel too unwell to persist as the gym leaves me feeling ill and fatigued for extended periods. I also struggle with breathlessness and heat sensitivity, which appears to be associated with my POTS. I welcome any insights or assistance with my situation!

Answers (1)

3/6/2026, 7:40:52 PM

OpenHealth AI

It's understandable to feel concerned about your elevated CK levels and the potential diagnosis of myositis, especially given your complex health history. Let's break this down to understand what may be happening and what steps you can take moving forward.

Key Points:

1. Elevated CK Levels: Creatine Kinase (CK) can be elevated for various reasons, including muscle injury, inflammation, or other underlying conditions.
2. Concerns about Myositis: Myositis is one possibility, but other explanations for your symptoms and CK levels also need to be considered, particularly given your existing conditions.
3. Next Steps: Close monitoring and further evaluation with specialists are key for accurate diagnosis and management.

Explanation:

Creatine Kinase Levels: Elevated CK often indicates muscle cell injury. Common causes include rigorous physical activity, trauma, and certain medical conditions like myositis. Since other labs returned normal, and doctors ruled out severe conditions like rhabdomyolysis, it’s important to explore less common causes.

Possible Conditions: Given your symptoms (weakness, pain, persistent fever, skin rashes), other conditions such as:

• Inflammatory myopathies (like myositis)
• Autoimmune conditions: These can sometimes present with overlapping symptoms, especially in the context of Ehlers-Danlos syndrome and POTS.
• Neurological disorders: Given your tremors and weakness, certain neurological issues could also contribute.

Your elevated ANA count and symptoms could suggest some form of systemic autoimmunity, and these warrants investigation.

Actionable Next Steps:

1. Follow-Up with a Rheumatologist: Given your complex symptoms and the possibility of myositis or another autoimmune condition, a thorough evaluation with a rheumatologist is essential. Bring your detailed medical history, recent lab results, and descriptions of your symptoms.

2. Document Symptom Patterns: Keep a diary of your symptoms, noting when they occur, their severity, and any factors that seem to trigger worsening (e.g., activity level, diet, or stress). This can provide important context for your doctors.

3. Consider Further Testing: Discuss with your rheumatologist the possibility of:

   • Muscle biopsy if indicated, especially if myositis is suspected.
   • Additional blood tests for specific autoantibodies or inflammatory markers.
   • Referral to a neurologist if your symptoms of weakness and tremors persist or worsen.

4. Monitor Activity Levels: Given your issues with POTS and potential muscle weakness, it may help to moderate your exercise. Engage in low-impact activities that do not exacerbate your symptoms.

5. Hydration and Nutrition: Continue your strategy of hydration (which is crucial for managing POTS) and consider a balanced diet rich in anti-inflammatory foods to support overall health.

6. Pain Management: Work with your healthcare provider to explore safe pain relief methods that may help address the discomfort you are experiencing, especially if it's impacting your quality of life and function.

Lastly, remember you are not alone in this. Keeping an open line of communication with your healthcare providers and advocating for further investigation of your symptoms is essential. Do not hesitate to reach out should you need more information or support.