Should I Be Concerned About The Numbing Sensation On My Scalp?

Hello, I had gum surgery on my left bottom molar and got an infection as a result at the healing site. I was prescribed penicillin and codeine. My periodontist told me I could double my previous dose of codeine to 60 mg which I did. On Sunday, I fainted and hit my head near the hairline, to the right side. Today, 2 days later, that area on my scalp and going halfway back of my head, feels slightly numb and tingly when I touch it. I do not have a headache and the pain is subsiding on my gums and the swelling that I had on that side of my face is coming down. Should I be concerned about the numbing sensation on my scalp? Thank you.