Medical advice is one of Gemini's best strengths.
Of course your doctor is the best place to get medical advice, but it's simply not practical or affordable, in fact it's not possible, to run every little ache, pain or concern by your doctor. Between visits it's your jobs to manage your own health. It's your job to know when you should see a doctor.
I talk to Gemini about medical stuff frequently. It's very helpful. In fact, without going into a long, boring story, Gemini once helped me avoid a major medical issue when something popped up on the weekend and I didn't want to pay thousands for an ER visit. It gave me the right advice, including when I needed to forget about money and go to the ER, and importantly, what to do over the weekend.