There is a painful condition that affects numerous individuals over the age of 60 and it is called shingles. If you have ever had it or known anyone that has you are very aware of how painful it is. The cause is the varicella virus and you can get it if you have had chickenpox earlier in your life. The body typically develops enough antibodies to the infection, however during times of severe stress or other anything that can compromises the immune system it can come back. The varicella virus becomes dormant in the nerve tissues and can become active.
Dealing with the pain is not easy and it can last for quite some time, and it is constant in nature. There might be a hardening in the ribs as the oxygen is being taken away during the herpes zosters attack. The thoracic cavity might feel bruised as well for the same reason. Treatments could include adding more fresh fruit to the diet; which helps due to the nutrient value of the fruit. Also adding vitamins and trying to drink water even when not thirsty seems to quiet the attacks.
The white blood cells are going to have to do their job in order to remove the herpes zosters and return the body to a normal functioning state. It is a process and talking to your doctor and getting a complete exam is the best advice you can get. They will give you what is needed to overcome this condition. It probably won't be cured overnight, but by following and doing what they say and getting plenty of rest will give the best odds of having a successful outcome.