Can Siofor aggravate leg ulcers?

It is unlikely that Siofor will make leg ulcers worse, although it is not excluded. If you suspect such an effect, I encourage you to read the article on reporting side effects of drugs: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane You posted a photo that indicates a relatively large redness of the limb. For my part, I would like to inform you that if you also feel pain, swelling, warming of the limb or fever, you should urgently consult a doctor. I will also add that the severity of venous ulceration may be the result of decompensated glycemia, venous circulation disorders and in most cases surgical and diabetic consultation is necessary. Early enough causes of severe symptoms significantly facilitate the subsequent treatment of the ulcer. Therefore, I encourage you to regularly measure your blood glucose levels and record them in your diary. I am allergic to the above-mentioned alarm symptoms. If you do not have the opportunity to consult a specialist, I enclose a link to the page where you can get medical advice online: https://www.gdziepolek.pl/telekonsultacja