Good evening, doctor, I would like to ask a question. I am a bit clean headed. Recently I saw blood borne infectious diseases, such as syphilis, hepatitis B and AIDS. These diseases are said to spread through wounds, and they are very tangled with other people's physical contact. When I go to the piano lessons, the teacher corrects my fingertips with my hands. She may just cut her fingernails a little bit sharp. When correcting, I feel a bit prickly on the back of my hand. After class, I found that there were three needle like wounds on my finger. I don't know whether it was an old wound or a wound stabbed by the other party's nail. It doesn't bleed, and it doesn't hurt to touch it. My hand has no obvious blood stain as shown in the figure. I wonder if the teacher will correct my fingering when her fingernails sharply scratch her own skin, and then my fingernails scratch me again. Then, with a small probability, we both have small wounds touching each other? Of course, generally speaking, there is no disease, but I can't help thinking about obsessive-compulsive disorder. For this kind of daily contact between hands, I will carefully observe whether there is such a small wound on the skin. No unclean behavior, but fear of this normal physical contact.
The so-called blood transmission of AIDS, usually refers to some large blood use behavior, such as the use of blood products, blood transfusion and so on, and you have nothing to do with this situation.
There is no risk of infection in daily life. On the one hand, you should regulate your sexual behavior, on the other hand, you should not inject drugs, so you can't get infected at all.