Markus Got Cherry Eyes

My pet Markus is often sick lately. We are suspecting it is because of the extreme heat of the weather. It's painful hearing him cry and wail when he is sick. I am massaging him for better blood circulation. He got a cherry eye but it is slowly improving after my massages. I hope it goes away so he can rest well and not be bothered by it. I am worried about all this, he is not that old to experience a lot of stuff with his body. I will need to focus more on him from now on because he really needs love and attention. My pets are family, I do not want them getting troubled or anything.