It is likely that the tortoise has an eye infection or inflammation, and it needs to take timely measures to help it recover. We can try to raise the water temperature of the tortoise. Adjust the water temperature to about 3 degrees, which helps to relieve its discomfort and promote blood circulation. Adding some mild fungicides to water can effectively reduce the infection caused by bacteria.

You can also clean the turtle's eyes. Gently wash the turtle's eyes with warm salt water, which helps to remove pus and bacteria from the eyes and alleviate the symptoms of swelling and redness. But be careful, be sure to use warm water and the right amount of salt.

Before giving proper treatment, we should also observe the tortoise. If the turtle's symptoms continue to deteriorate or there are other abnormal conditions, it is recommended to seek medical advice immediately. Professional veterinarians will further examine the physical condition of turtles and give correct treatment plans.

Besides eye problems, turtles may not eat for other reasons. This may be caused by environmental problems, diseases or other pressures. In order to help the tortoise regain its appetite, we can try to change its feeding environment to ensure clean water quality, appropriate temperature and comfortable climate. It is also necessary to provide proper food and nutritional supplements.

We need to take active measures to help the turtle recover from the situation that its eyes are red and swollen, its skin is red and it doesn't eat. Adjusting the water temperature, cleaning the eyes and observing the changes of the disease are all effective methods. If the situation does not improve or other abnormal symptoms appear, it is recommended to seek medical help from professional veterinarians in time. Remember to be patient and careful, care about the turtle's health, and make sure to provide a good feeding environment and proper diet.