<s>[INST] I have red oval rash on the left side chest, hip, buttocks and thigh. Headache on left side with left earache. No fever at this time. Had a tick bite positive anitbody test for lyme disease.  Did 21 days of doxycycoline treatment.  Rash and headache came on 5 days after I finished the doxy treatment.  Any idea what is causing this?  Thank you [/INST] Hello, Thanks for the query. Skin rash is a manifestation of Lyme disease. In fact, it is one of most common manifestation of Lyme. You don't need to worry slowly this rash will disappear.It's good that you have taken treatment. Let me know if you have any other doubt. You can ask a direct question to me on this forum, following the below link.https://urldefense.com/v3/__http://www.ChatDoctor .com/doctors/ Chat Doctor. Thank you </s>