The political situation in Bahrain has affected many expats working there. Many employers have sent families home or have been recalled where possible. Obviously, there is a massively higher than normal risk of injury at the moment. So making sure expatriate workers there are going to be able to get quality treatment and prompt repatriation is more important than ever.
The Bahraini Government has already announced that medical insurance will be compulsory for all expats from 2013. Initially this will only affect companies with more than 500 people on the payroll. Current information points to the fact that all foreign nationals will be required to have health insurance shortly afterwards. The Telegraph recently published a great article about healthcare in Bahrain.
Our advice would be that you would be mad not to have cover at the moment.