Thank you for your reply,
The spots that you have are very common and are called Seborrheic Keratosis.
These spots are genetic (which means someone in your family had them and passed them on to you) and start to appear as you get older (we jokingly called them "signs of maturity"). Although they do resemble warts, they are not warts and are not contagious.
They can itch especially in the drier winter months. The only way to get rid of them is by doing liquid nitrogen treatment (called cryotherapy). This should be done by a dermatologist. Insurance companies don't like to pay for this treatment (because it is considered cosmetic nuisance) but if you say that they itch and bleed, the treatment should be covered.
You can also alleviate some of the itching by using an over-the-counter medicated moisturizer called Ammonium Lactate. This lotion can sometimes get rid of the small ones but generally we use it to control the itching.
I hope you find this information helpful. Please feel free to follow-up with any other questions you might have.
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Best wishes and good luck,