Most of the problem of bugs crawling the skin is due to anxiety and stress. People do have this sort of problem when they are in stress and is normal. The more you think about bugs, the more it crawls on your skin, so the first remedy is to forget it. Secondly taking over the counter antihistamines for few days might resolve. The most important is to visit a dermatologist in person so he can examine if it is related to some disease and suggest you the best option. Most probably it might be just due to stress and forgetting about the bugs might resolve the problem. If you search the web about the bugs crawling you'll get different opinions and thinking about those opinions might make the condition worse. So try making up your mind that this is just a normal and you don't have any bugs crawling on your skin. If it doesn't work visit a dermatologist.