In most cases, these densities are the result of prior pulmonary infections (pneumonia), and are benign, and require no treatment at all. In rare cases, particularly (but not exclusively) in smokers, these scars can be the first sign of an unusual form of cancer known as bronchoalveolar carcinoma.
You might wish to see a Pulmonologist, who can examine your husband and review his x-rays.
I am not aware of any role for herbal medications for this particular problem.
Sincerely/ Robert A. Wascher, MD, FACS
http://doctorwascher.com
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