Skin infection with burning sensation.

I have had a surgery ORIF of Clavicle and Femur shaft on 9th June,2022 after I had faced a bike accident. I was on Cetil 500 medication for consecutive 10 days, on the 15th day stiches were removed without any complications. On the 20 the day I  noticed red rashes on the skin just below the clavicle surgery incision mark. I had initially thought it to be an infection caused from an insect (spider or cockroach) so proceeded to apply Suthol and Lacto calamine, accompanied by a dose L-histamine. The skin infection seemed to have dried. So stopped on the medicine, but kept applying Suthol and Lacto calamine. Now the infection seems to have proceeded downward towards my chest skin and the burning and itching sensation has started again. Is this from insect bite or something else ? What to do ? PS: 1. It is very hard for me visit a doctor at OPD with a broken leg. 2. All other parameters like BSL, BP, etc. according to blood reports state as stable and normal.