I hit my head on left temple against tile wall in shower. it was a mild tap. i have slight headache. i take turmeric supplements. what is best treatment?

Not clear that you need any treatment at this point, even if you take blood thinners. But if severe headaches, nausea and/ or vomiting, dizziness or imbalance, double or blurred vision, notify your doctor

Because bleeding is a possible potential side effect of turmeric , one should stop taking it immediately. A visit to PCP for evaluation and follow up is in order as one might have avoidable slow bleed deeper injury, with early care.