I hve a friend at my house he said he didnt feel well had to lay down legs cramping feels hot and not sure wht to do think it may be cotton fever ?

See a doctor: so-called "cotton fever" involves shaking chills, cough and chest pain most of the time, not just "feeling hot." You cannot tell the difference between this and having a severe infection like endocarditis without a doctor. Your friend needs medical help and needs to stop using IV drugs, and if you have similar issues, so do you. Get help for both of you. Alanon can help you help your friend.

More than a feeling.: There comes a time when the best thing you can do for your friend is not to over think a potentially serious problem. Without a competent history and physical examination, you're playing with fire. Have him see a physician.