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I passed carefully through your question and would explain that your symptoms could be related to chronic inflammation or a chronic infection. An allergic reaction
can not be excluded either, considering the red raised bumps on the arms, legs and back.
For this reason, I would recommend consulting with your attending physician for a careful physical exam and some tests to investigate for the possible underlying causes:
- a resting ECG
- a chest X ray
study and pulmonary function tests
- complete blood count
- PCR, ESR for inflammation
- blood electrolytes
- an abdominal ultrasound
- a stool bacterial culture
- a urine analysis.
Further tests may be needed if the above tests are suggestive for a chronic infection.
Consulting with a dermatologist
may be needed to investigate for the nature of the red bumps.
You should discuss with your doctor on the above issues.