<s>[INST] I ve had pain in my big toe for a few days now, I thought it was an ingrown toenail but I just took the toenail polish off and my toe is blueish in color under the nail on that side. I ve not bumped it, I did however go to an amusement park recently and I wore fairly tight shoes. [/INST] Hello, It could be a vascular cause due to poor blood supply. Consult a vascular surgeon and evaluated. A Doppler scan is required for further evaluation. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Shinas Hussain, General & Family Physician </s>