The risk of HIV or Hepatitis B infection from the scenario you told me about is extremely low. HIV and Hepatitis B are primarily transmitted through the infection of the blood of the infected persons. The symptoms may include being feeble, jaundice, or flu-like symptoms. 

According to me, it is liposuction. It can be done in 1-2 hrs. But please note, liposuction is only recommended if you want to remove small amounts of fats. Many people mistake it as a weight loss procedure. I suggest you to visit a doctor for proper examination. Based on that, it will be decided whether you eligible for liposuction or need some other procedure to remove fat from your face and double chin. 

This could be a case of surgical site infection. Usually, this happens after surgery where there is an incision made thereby causing redness as well as swelling around where you were cut. It might help if you keep that place dry after cleaning it every once in a while but try not to touch too much or else there might be more pain. Make sure to visit your doctor so they can figure out what else needs to be done about this.

After a hysterectomy, especially initially, be gentle with your movements. Before sitting, ensure you have adequate support, such as handrails or a nearby sink or counter to assist you. Keep your movements slow and controlled. 

When you have a dog bite, the area may hurt, swell, and turn red which could also bleed occasionally. Clean the wound softly with clean water and mild soap because it’s important after which you apply some antibiotic ointment or cream then cover with a dry sterile cloth or adhesive bandages. Make sure you visit a doctor for some checkups to ensure everything is okay since there might be more treatment needed like a tetanus shot among others.

If you notice any fluids leaking from it, this could mean there’s an infection. Other signs of infection may be redness, warmth, swelling, and pain around the area where the incision was made. Usually infections are caused by bacteria. It’s crucial that you get in touch with your surgeons as soon as possible so that they could adjust your drugs or give you additional treatment if necessary.

You must visit your doctor who performed the surgery since you are experiencing delayed healing or persistent wound leakage after surgery. They will be able to assess the wound and provide appropriate advice or treatment.