Common diseases in hamsters include skin diseases, wet tail, colds, malocclusion, cheek pouch inflammation, tumors, heatstroke, constipation, and diarrhea.
Skin Diseases: Hamster skin diseases can be caused by parasites, bacteria, or nutritional deficiencies. Symptoms include red and swollen skin, hair loss, and itching. Treatment methods include using antiparasitic drugs, cleaning the environment, and supplementing with minerals and vitamins.

Wet Tail: This is a serious diarrhea - related disease. Symptoms include a wet tail, grayish - white and foul - smelling feces. Treatment involves keeping the cage clean, warm, and well - ventilated, using wet - tail medications, or an appropriate amount of antibiotics and diluted glucose.
Colds: Symptoms are sneezing, runny nose, and lethargy. Treatment includes keeping the hamster warm, providing a warm sleeping environment, and administering cold medicine.
Malocclusion: Caused by overgrown teeth or insufficient tooth - grinding, symptoms include drooling and loss of appetite. The solution is to trim the teeth regularly or provide hard foods to help with tooth - grinding.
Cheek Pouch Inflammation: Caused by a punctured or infected cheek pouch, symptoms include bad breath and swollen cheeks. Treatment methods include regularly cleaning the cheek pouch and using physiological saline.
Tumors: Tumors can be benign or malignant. Symptoms include the appearance of a protrusion on some part of the body. Benign tumors need to be surgically removed, while malignant tumors require treatment with anti - cancer drugs.
Heatstroke: Symptoms include an elevated body temperature and listlessness. The solution is to provide a cool environment and replenish water.
Constipation: Symptoms include difficulty in defecation and an enlarged abdomen. Treatment involves increasing foods high in fiber and water content.
Diarrhea: Usually caused by improper diet, symptoms include loose feces. Treatment includes maintaining environmental hygiene and providing easily digestible foods.
Knowledge of these disease symptoms and treatment methods can help hamster owners better take care of their pets' health, ensuring that hamsters can grow up healthily.