Medical consequences of chronic heroin abuse include scarred and/or collapsed veins, bacterial infections of the blood vessels and heart valves, abscesses (boils) and other soft-tissue infections, and liver or kidney disease. Heroin leads to depressing effects in respiration. This in turn takes a poor health condition leading to various types of tuberculosis and pneumonia. Since heroin has the substances which do not dissolve fast, the lungs, kidney, liver, and brain may start to deteriorate in its functioning and that may lead to clogging in blood vessels. This even leads to small infections and in utmost cases, it may even lead to the death of some parts of the important organs of the body. The immune system of the body reacts and many other contaminants present in the body may also lead to arthritis and other problems. Of course, sharing of heroin injection equipment or fluids can cause a number of the foremost severe consequences of heroin abuse-infections with hepatitis B and C, HIV, and a host of other blood-borne viruses, which heroin drug abusers can then pass on to their sexual partners and children.