Though there is no mention of circumcision in our scriptures. Neither it prohibits it, nor allows it.
Circumcision is often related with jews and muslims customs.
But can a Hindu get circumcised for medical reasons?
Certain Gurus don't recommend volunteered circumcision as it's not usually required.
In addition to Dr. Tandavan's analysis, HINDUISM TODAY requested Reverend Swami Satchitananda to comment on circumcision:
"There is no mention of circumcision in any Hindu literature, as least as far as I know. Personally, I feel circumcision is against nature. If God wanted that skin to not be there, it would have been very easy for God to not have put it there. [source]
But in general there is no specific religious view on this topic.
There is no reference to male circumcision in the Hindu holy books, and both Hinduism and Buddhism appear to have a neutral view on circumcision. [Wikipedia with internal sources inside]
For medical reasons, one should go for the required treatment, especially when there are no religious restrictions.