You should remove any hazardous decorations or aggressive fish from your betta's environment. Your fish's vision is most likely impaired, which means that the likelihood of running into sharp objects inside the aquarium or getting even more injured by other fish is higher. Avoid this easily by putting your fish in its own separate tank temporarily. Epsom salt, or magnesium sulfate, does a good job of removing the fluid that's built up behind your betta fish's eye. Every three days, add one tablespoon for every 5 gallons (18.9L) of water that your fish is in. There are several different antibiotics that when added to the betta fish's water, will make the popeye subside. Typically, you can purchase these antibiotics at pet stores. Put ampicillin in the fish tank and switch out the water every third day. Administer the medicine until a week after your fish's popeye has gone away. If you catch the popeye early enough, you can use erythromycin, minocycline, trimethoprim, or sulfadimidine, which are all antibiotics typically used to treat fin rot. It can take anywhere from a couple weeks to a couple months for the swelling to go down, and even longer for cornea damage to improve. Reintroduce your betta to its original environment a couple of weeks after its eyes look their normal size. In more severe cases, one of the betta's eyes might decay and fall off during the healing process. If this happens, keep your betta isolated permanently.

Summary: Isolate the betta fish. Put epsom salts in the fish tank. Add an antibiotic to the betta fish's water. Return your betta fish to its original tank after the swelling subsides.

It's going to be difficult to fake swelling or spots in your throat, so stick to having symptoms that you can control like pain, fatigue, and fever. It's a good idea to not take anything that claims to give you the actual physical symptoms of strep throat. These could make you very sick. Someone with strep throat is usually in too much pain to talk a lot. If you reply to questions with head or hand gestures or even by writing notes, this helps convince people that your throat is too sore to talk. It's also advisable that when you do say something, not to say it too loudly or yell. Remember, you're in too much pain to really even be talking. This can also be particularly effective if you're looking to get out of a commitment on the same day. This is a dead giveaway that you're probably not sick and trying to get out of something. This demonstrates that not only is your throat hurting so much it hurts to swallow, but also that you're being careful to not further irritate it. Closing your eyes and lightly wincing when you do slowly swallow reinforces just how much your strep throat hurts. This is one way to soothe an actual sore throat and will show that you're trying to take care of yourself. If you don't show any energy or motivation to do things you normally like, this will show that you're not feeling like your usual self. Don't be too sluggish. Showing general fatigue, such as not moving around much or not wanting to get out of bed other than to use the bathroom is plenty. It's not a good idea to collapse or fall out of bed as it might end with an unwanted doctor's visit. If someone mentions that you're missing a commitment, say something along the lines of "I'm sorry to miss school/ work today because we had a group lunch planned." Don't smile too much or appear happy. Again, you're feeling sick and want to convince others of this as well. Looking happy will make them question whether or not you're really ill. It's not easy to tell if someone has a fever unless it's fairly high. Faking a fever will make it seem like you are sick. Wrapping yourself in blankets will raise your body temperature slightly for the case that someone wants to take your temperature. Lightly jogging in place will flush your skin and may cause you to sweat, making it appear as though you have a fever. Just make sure no one sees you jogging. Spraying your face with a light mist is another option to show that your body is fighting a fever. If you're eating a lot, especially of heavy foods that could irritate your throat further, it will cast doubt on to your illness. Eat things like soup, bananas, yogurt, or other soft foods that won't exacerbate your strep symptoms. Drink soothing liquids like tea with honey or cold water. While you want to show that you have the symptoms of strep throat to legitimate your illness, going overboard with symptoms is likely to expose that you're not actually sick. For example, it's impossible to have a temperature of 107 degrees Fahrenheit without being seriously ill or dead. Stay within real limits to avoid someone figuring out that you're not really sick.
Summary: Have controllable symptoms. Avoid talking to show how much your throat hurts. Avoid talking about whatever commitment you don't want to attend. Swallow slowly and show your pain. Gargle with salt water. Be tired, sluggish, and sad. Have a fever. Don't eat a lot, especially heavy foods. Don't overdo it with symptoms.