Raised white bumps on a goldfish's head may be caused by white spot disease. White spot disease is an external parasitic disease that goldfish often suffer from. They often parasitize on the gills and skin of goldfish. The cysts of small melon worms are white. At this time, the owner can find a needle, sterilize and prick the white bag, take out the parasites, and then apply yellow powder on the wound for treatment.

Common parasitic diseases and treatment methods for ornamental fish:

1. White spot disease: White spot disease is the most common parasitic disease. The name of the parasite that causes the disease is It is a small melon insect that usually infects fish during low temperature periods. After becoming infected, white spots will appear on the body, and there will be more and more white spots. Treatment is also very simple. As long as the temperature is appropriately raised, when the water temperature is 28°C, the small melon worms will be eliminated.

2. Trichodiasis: Trichodiasis usually parasitizes the gills and nostrils of fish. When the number is small, there will be no symptoms. Too many will cause the fish to become thin, eat poorly, and swim. Movement is slow and breathing is difficult. If you want to treat it, you can soak it in 2-3% salt water for 5-10 minutes every day.

3. Third-generation worm disease: Third-generation worm disease parasitizes the body surface and gills of fish. After the disease, the mucous membrane will be white and lose its luster. This disease needs to be treated by soaking in trichlorfon solution, 10 mg per liter of water, soaking for 15-20 minutes, and you can recover in a few days.

4. Filariasis: Filariasis mainly occurs in small fish tanks and small fish ponds, and the disease mostly occurs at low temperatures. When the condition is mild, it can be treated by soaking with 2% salt water or potassium permanganate.