Alterations in red blood cells during condition of oxidative stress. Download Scientific Diagram Full article: Molecular insights of p benzoquinone induced red blood cell dysfunction: probable implications to cigarette smoke associated pathologies Heinz bodies are small clumps of damaged hemoglobin found inside red blood cells. They form due to oxidative stress and are often seen in conditions like G6PD deficiency. Their presence can indicate Glucose 6 phosphate Dehydrogenase (G6PD) Deficiency Concise Medical Knowledge