Jackson's Actions

All human actions have one or more of these seven causes: chance, nature, compulsion, habit, reason, passion, and desire. --Aristotle (384 BC - 322 BC) <

The mouth relates to several things, one of those being it's where sound waves or speech primarily emanate from the body. The Internet is a place where speech of various kinds is abundant, most often through the keyboard which relates to the hand, so dream symbols of a spider in a hand biting when the hand covers the mouth may relate to the 'web,' THE World Wide Web.

Is something about the Internet bugging or biting you?

This post of yours has a painting titled Forms 4. The spider bit in four places, so perhaps the dream means something specific to this painting of yours. A hand covering the mouth may be the speechless aspect of painting as communication and art. As a guide to the dream's symbols' meanings, you might ask yourself what this painting means to you.

I've often read that you are the best person to interpret your own dream symbols: your dreams come through the filter of your mind. Perhaps painting is one way of expressing inner visions: dreaming may be one way the super-conscious communicates with sub-conscious minds.
 

thanks, very interesting indeed!
I love the association you've made to the web. Not sure that the painting goes there (in my head) but it's an interesting thought indeed.