Please let me know if there is any treatment for inguinal hernia in a child of 2.5 years other than surgical method?

Hernia. No. Inguinal hernias are not benign. Of course most do not create problems. You should go get it repaired. It is a very easy procedure.
There is not. Surgery is the best treatment and is a fairly simple outpatient procedure with a high success rate. Putting it off risks complications like incarceration with loss or damage to the testicle. It is best to choose a surgeon who does the procedure on children many times a year like a general pediatric surgeon or pediatric urologist. Many general surgeons or urologists will also qualify.

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Inguinal hernia surgery problems ten years post surgery?

Need explanation. What type of problems you have, need information like pain , recurrence , infected graft etc, see a surgeon for clinical examination and required treatment. Read more...
What problems. Chronic pain>? Recurrence of hernia. Neural therapy may help or prolotherapy may help. Or may need surgery again, . Need more information to make logical conclusion of your question. Read more...

Does it ever happen that a minor inguinal hernia, mainly exhibiting as occasional testicle pain, be healed by non-surgical methods?

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