Can we write sosl in triggers in salesforce?

Hi Saurabh,

Yes, you can write SOSL inside triggers.There is no such restriction.

You can test using the following Code in your Org.
trigger trg_AccountSOSL on Account (before insert, before update) {
List<List<SObject>> searchList = [FIND 'map*' IN ALL FIELDS RETURNING Account (Id, Name), Contact, Opportunity, Lead];
List<account> myAcc = ((List<Account>)searchList[0]);
system.debug(myAcc[0].name);
}