Oh, it's the absolute worst—usually tastes incredibly sour, metallic, and like pure yellow acid because there's often no food in the stomach. My tip is to keep some dry biscuits on your bedside table and chew one before even sitting up in the morning, it helps cut down that acid taste.
I remember it being extremely sour and burning because it was mostly stomach acid on an empty stomach. Please be very gentle with yourself during this phase, and if the vomiting is too severe and you can't keep water down, contact your doctor immediately.
It is usually very sour and yellow, which is just stomach acid and bile. My mother-in-law advised me to chew on curry leaves or small pieces of ginger, but when it became too much, my doctor safely prescribed a mild morning sickness tablet. Do what works best for you.
For me, it tasted very acidic and left a horrible metallic burning sensation in my throat. But the good news is that this phase passes, and once your baby is in your arms, you'll completely forget all these bad tastes! Just hang in there.
Honestly, it just tastes very bitter, acidic, and metallic, which is awful. If you are vomiting constantly, don't run to get expensive private IV treatments right away unless your gynac prescribes it. Try simple things like small sips of ginger water first to save on extra clinic costs.