4 (also monitor lizard) A large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles.Called goanna in Australia. (also monitor lizard) A large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles.
The most effective way to prevent black toenails is to run in shoes that fit properly. You should have a thumbnails width room between your big toe and the front of your shoe while standing, not sitting. You should also wear moisture thin, moisture wicking socks to prevent increased heat build-up.
Here are some tips to help you prevent toenail problems: 1  Always watch for changes in the skin and nails. 2  Such changes may indicate an underlying problem that should be checked by your podiatrist. 3  Trim your nails straight across, and not too short. 4  File your nails regularly in order to prevent sharp edges.