My wife has a bad headache for the last 2 days. What should she do? Is this a sign for migraine? If it is what should we do? Thank you doctors

Different thing. Migraine is NOT simply a BAD headache - it's specific unique patterns and has specific causes, Tx's, etc. You can read online but for now - any other symptoms? If it's causing problems like lack of sleep, nausea, etc. go to a clinic or Dr. An exam will help define and treat hopefully. Also cool or warm compresses, water, OTC pills quiet/dim room may all help. Best!