What should you know about hepatitis C associated diseases?

Hepatitis C is linked mainly with progressive liver disease, but it can also be associated with conditions affecting the blood, kidneys, skin, and immune system. The virus may cause ongoing inflammation in the liver, which can lead to scarring called fibrosis and, when advanced, cirrhosis. Long-term liver damage can increase the risk of liver failure and liver cancer. Hepatitis C may also trigger immune-complex problems such as cryoglobulinaemia, which can affect small blood vessels, joints, nerves, or the kidneys.

Some people have no symptoms while liver injury develops. Others notice tiredness, nausea, discomfort under the right ribs, dark urine, or yellowing of the skin and eyes. Fatigue can have many causes, so it does not identify hepatitis C by itself. Outside the liver, hepatitis C has been associated with kidney inflammation, mixed cryoglobulinaemia, certain skin disorders such as lichen planus or porphyria cutanea tarda, and metabolic problems including type 2 diabetes. An association does not prove that hepatitis C caused a particular condition; a clinician needs to assess other possible explanations and the timing of symptoms.

Arrange a GP consultation if you have hepatitis C, have been told that liver tests are abnormal, or have symptoms that could reflect liver or kidney involvement. Assessment may include a review of medicines and alcohol use, blood tests for liver inflammation and function, and tests that show whether the virus is currently present. A liver function test can help assess how the liver is working, but it cannot by itself confirm or exclude every associated condition. Follow-up may also include checks for liver scarring and referral to a specialist when findings suggest advanced disease.

Seek urgent medical help for vomiting blood, black or bloody stools, severe confusion, fainting, rapidly increasing abdominal swelling, or sudden severe weakness. Prompt assessment is also needed for new yellowing of the skin or eyes, very dark urine with pale stools, swelling of the legs, or markedly reduced urination. These signs can indicate serious liver or kidney complications and should not be judged by how mild earlier symptoms seemed.

Ask which tests are needed to check for liver scarring, whether your liver function needs monitoring, and whether any symptoms could point to kidney, blood-vessel, skin, or immune-system involvement. You can also ask whether treatment for hepatitis C is appropriate, which medicines or supplements should be avoided, and what symptoms should prompt an urgent call. Bring a list of prescribed medicines, over-the-counter products, and supplements to the appointment.