<s>[INST] I have a strange rash that is like lots of little bruises mostly over my legs and thighs. I have been prescribed antihistamines but it hasn t gone at all. A few weeks ago I was on anti biotics after I had my wisdom tooth removed. The doctor also prescribed prednisone, I have also had allergic reactions and have been injected with antihistamine and steroids. I also had a blood test and my platelets were slightly low. Do you think the amount of medication i was taking the rash could be linked? [/INST] Hi, It may be a purpuric rash caused by the antibiotic. Still, consult the dermatologist for the perfect diagnosis and proper treatment. Stop the antibiotic. Take vitamin C 1000 mg daily for a long time. Apply Thrombophob ointment on the rash. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Ilyas Patel, Dermatologist </s>