What Is Hepatitis?

Plenty of people hear "hepatitis" and picture one illness, caught one way, with one outcome. Almost every part of that picture is wrong — and untangling it matters, because some forms clear on their own while others quietly need long-term care. At its simplest, hepatitis just means inflammation of the liver. The short video above, "Hepatitis A and B" (just under three minutes), puts it the way clinicians do: the condition can be self-limiting, or it can progress over time to fibrosis — scarring — and beyond. Hepatitis viruses are the most common cause worldwide, but they aren't the only one, and the letter after the word changes a great deal.

Myth: there is only one hepatitis. Fact: the letters are different illnesses

Hepatitis A, B, C, D and E are separate viruses that happen to target the same organ. They spread differently, too. Hepatitis A and E usually travel through contaminated food or water. Hepatitis B and C are mainly blood-borne — B can also pass through other body fluids and from mother to baby around birth, a point the site's "Hepatitis B Virus Video" makes in its opening key facts, noting that B can cause both acute and chronic disease. Hepatitis D is the odd one out: it only occurs in people already infected with B. And viruses don't have the field to themselves. Heavy alcohol use, some medicines, fatty liver disease and autoimmune conditions — where the immune system attacks the liver itself — can all inflame the liver without any virus involved.

Myth: you would always know you had it. Fact: it is often silent at first

Here's the uncomfortable truth: many people with hepatitis feel completely well, especially early on. When symptoms do appear, they're frustratingly general — tiredness, nausea, loss of appetite, a dull ache over the liver, dark urine, or yellowing of the eyes and skin (jaundice). Because the early picture is so vague, hepatitis is very often found by blood tests rather than by how someone feels. Those tests usually look in two directions at once: liver enzymes, which rise when liver cells are inflamed or injured, and virus markers, which can show which hepatitis virus is present and whether an infection is recent or long-standing. That distinction — a short-lived acute infection versus a chronic one that persists — is what shapes everything that follows. Hepatitis A, for instance, doesn't become chronic, while B and C sometimes do, which is why they receive the closest long-term follow-up and why scarring is monitored; in advanced cases the conversation can eventually reach what a liver transplant involves.

Myth: nothing can be done. Fact: prevention and care depend on the type

Quite a lot can be done — it just isn't one single plan. Vaccines exist for hepatitis A and B, and vaccination is the reason B has become less common in many places. Reducing alcohol, reviewing medicines that strain the liver, and treating the underlying cause where one is found are the other broad pillars. For chronic viral hepatitis, specialist care focuses on monitoring the liver, checking virus activity, and deciding whether antiviral treatment is appropriate for that person — a decision that depends on the virus, the blood results and the state of the liver, so this article won't name drugs or promise outcomes. What you can do without waiting is simpler: if you're told a blood test has shown hepatitis, ask which type it is, whether it's acute or chronic, and what follow-up is planned. Those three answers turn a frightening word into a manageable plan — and if you develop marked jaundice, severe abdominal pain, confusion or vomiting blood, seek urgent care the same day rather than waiting for a routine appointment.

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician and researcher.

Frequently Asked Questions

Is hepatitis contagious?
Viral hepatitis can be, but how it spreads depends on the type. Hepatitis A and E usually spread through contaminated food or water, while B and C spread mainly through blood — and B also through other body fluids. Hepatitis caused by alcohol, medicines, fatty liver or autoimmunity isn't contagious at all.

Can hepatitis go away on its own?
Sometimes. As the anchor video notes, the condition can be self-limiting: hepatitis A always resolves on its own and never becomes chronic, and some acute B infections clear too. Other infections persist as chronic hepatitis and need monitoring, which is why follow-up blood tests matter even when you feel well.

How is hepatitis diagnosed?
Mainly by blood tests. Liver enzyme results show whether the liver is inflamed, and virus marker tests can identify which hepatitis virus is present and whether the infection is recent or long-standing. A clinician may add scans or other checks to look at the liver itself and assess any scarring.

Educational only — this article is general information about hepatitis, not medical advice and not a diagnosis. If a blood test has shown hepatitis, discuss the type, follow-up and treatment options with your own clinician or a liver specialist.