Greating am in h4 visa but it's single entry am I still able to travel outside USA and come back without problems?

If you have a single entry visa, you must have it renewed when taking a trip outside the US. While there is no guarantee that an American consulate or embassy will renew the visa, consular officers will usually allow the renewal unless there are circumstances that they believe need to be looked into. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.