<s>[INST] I have a ( what i thought was a spider bite on the bottom of my foot, it has been there for weeks, it is rock hard like,a callus consisted of dead,skin, has an open hole in the center. on sometimes hurts to walk on it. My mom told me to try and pop it, so i just squeezed a little and it hurt alot [/INST] It is likely you have a plantar wart. This is a lesion that looks like a callus that typically appears on the bottom of the foot. It is caused by a virus. These can be painful and can get bigger or spread. They may require repeated treatments to get them under control. Popping it does not help. Sometimes the callus needs to be carved down with a surgical knife and the lesion frozen or lasered to kill the virus. Best to see your family doctor, a dermatologist, or a podiatrist to get it properly diagnosed and treated. Hope this helps. </s>