Most visa applications are refused under Section 214(b) of the Immigration and Nationality Act. The law requires that the consular officer must assume that each applicant plans to live permanently in the U.S., i.e. has immigration intent. Therefore, each applicant must demonstrate strong social, economic and professional ties, among other ties, to their home country in order to qualify for a visa.
There are no time limits or restrictions for reapplying. However, we recommend that applicants wait at least six months before applying again. We have found that it takes at least that long for a person´s circumstances to change to the extent that they might qualify for a visa.
For more details on visa denials please check here: http://travel.state.gov/visa/frvi/denials/denials_1361.html
Visa information is confidential. The Consular Section cannot discuss details of a visa refusal with anyone but the applicant (including close relatives). The consular section does not discuss visa denials via phone. Applicants may send an e-mail with such inquiries to firstname.lastname@example.org. Please note there is no appeal process for a visa denial short of applying again.