Is Migraines, Nausea And Face Discoloration After Sun Exposure Due To Sun Allergy?

Direct sunlight exposure often gives me instant migraines, nausea, diahrrea, as well as gradually spreading brown blotches of discoloration on my face. Could this be a sun allergy? I've looked up sun allergies and the most common sympton is rash, but I don't get any rashes. Just the migraines etc described above.