It could be a lot of things. Try washing your hands really well... if it is allergies, that might help. There are over the counter rash creams you could try as well, but if it is is serious, or if it lasts more than a day, I suggest seeing a doctor who can tell a lot better what it is and how to help.
They are the same thing, glioblastoma multiforme is the full technical name for this form of brain cancer.
glioblastoma multiforme
According to the book, Paediatric Central Nervous System Tumors, those with gliobastoma multiforme have an "almost universally fatal outcome."
Erythema multiforme is a skin disorder due to an allergic reaction or infection. The symptoms are fever, general ill feeling, itching of the skin, joint aches, and multiple skin lesions. If not treated it can be really serious, even fatal.
Erythema multiforme appears on the skin and the mucous membranes (the lining of the mouth, digestive tract, vagina, and other organs). Large, symmetrical red blotches appear all over the skin in a circular pattern. On mucous membranes.
Erythema Multiforme is usually caused by a reaction to a certain type of medication. The best way to treat the hypersenstivity is to treat the intial problem that you had when your medication first began.
It is a cancerous brain tumor: Glioblastoma Multiforme, Stage 4.
Glioblastoma multiforme accounts for about 15 percent of all brain tumor cases. The tumor is mostly found in adults, who are between the ages of 45 and 70.
Erythema multiforme causes a burning sensation in affected areas, fever, malaise, myalgias, arthralgias, headache, sore throat, cough, nausea, vomiting, oral pain, eye pain, and diarrhea.
Information on glioblastoma multiforme brain tumors can be found on WebMd, Patient Guide, Brain Health, Cedars Sinai, eMedicine, and Brain Tumor Treatment.
Severe trauma is the most likely to be immediately fatal. However, any condition that affects the brain can cause death.