Hi I did review your concern. Your condition requires expert care in form of specific investigations for finding cause of small nerve neuropathy including a skin biopsy, work up for diabetes, vitamin deficiency or other multitudes of diseases. also concomitant petechiae need to be seen differently right now as in by doing a complete coagulation profile. In a young female, i would suspect autoimmune disorder like systemic lupus erythematous which such different system findings and do ANA and dsDNA as well as anti smith antigen assay. I hope this helps Let me know if you have any more questions or concerns and I will try to help you with best of my abilities. Wish you all the best sincerely, Dr Parth Desai