If you go FIRST to where your photos are stored on your device, there should be an option to email a file, or multiple files.
On an iPhone, once you click the photos icon, click the arrow on the upper right. Then you can lightly tap one or multiple photos (don't open them). You'll see a red circle with a check mark with each one you tap. Then at the bottom left of the screen tap "Share". You will see the option to Email. That will take you to your email, and the photos, or all photos will be attached, and you can create your email.
There should be similar options on any device that stores photos and that you use for email.