The lovely Mandi Lynn (author of ‘Essence’ & ‘I Am Mercy’) said something around these lines in one of her videos once, and I really liked the advice. So I am just going to reiterate it.
When you are going to write, you simply must read. How else are you going to understand the ways of a book? You simply cannot write unless you read. The more you read, the more you want to write.
From personal experience, I can concur this theory to be true. I went through a major writer’s block phase a few months ago, and found myself in a bit of a reading slump as well. It was so hard for me to pick up a book, but it was even worse when I sat down to write. People ask me what they can do to help in similar circumstances. My advice is always the same.
Do not force your writing.
If you find yourself struggling to write, do not force it. It will only make the block worse. Take a break. Open a different project for a while. Back away from the PC (laptop, iPad, iPod, etc.). Do not even try to pick it up until you feel that sensation come back. This may not work for you. Everyone has different methods. But that does not mean you should not give it a try.