Dark yellow pee is most often a sign that you’re dehydrated. It can also happen after vitamins, certain foods, or some medicines, but if it stays dark even after you drink more water, it can point to a health issue that should be checked.

Common reasons

  • Not drinking enough fluids, especially after sweating, exercise, heat, or illness.
  • Vitamin supplements, especially B vitamins, which can make urine look brighter or darker.
  • Foods and medications that change urine color.
  • Less commonly, liver, kidney, or urinary tract problems.

When to worry

Seek medical care sooner if your urine is:

  • Tea-colored or cola-colored.
  • Bloody, pink, or red.
  • Foamy, very dark, or persistent despite good hydration.
  • Accompanied by fever, pain, burning, weakness, or fatigue.

What to do now

  1. Drink water over the next few hours.
  2. Check whether the color becomes lighter.
  3. Review any recent vitamins, supplements, or medications.
  4. Get medical advice if it does not improve or you have other symptoms.

A simple rule of thumb: pale yellow usually means well-hydrated, while dark yellow often means you need more fluids.