1) Hydroceles can be caused by inflammation or infection of the epididymis or testicles.
2) Cysts are typically caused by Iodine deficiency, especially cysts in the testicles, breasts, ovaries & uterus. While cysts can appear anywhere in the body deficient in iodine, they are usually related to the reproductive system. Examples are FibroCYSTic breast disease, PCOS (PolyCISTic Ovary disease, testicular Cysts. This Iodine deficiency typically leads to related cancers over time.
In view of this information I suggest that you take a dual treatment approach.