Answer the following question: Answer the following question given this paragraph: A headache is a very common nervous system problem. Headaches may be a symptom of serious diseases, but they are more commonly due to muscle tension. A tension headache occurs when muscles in the shoulders, neck, and head become too tense. This often happens when people are "stressed out. " Just trying to relax may help relieve this type of headache. Mild pain relievers such as ibuprofen may also help. Q: What common ailment is typically caused by tense muscles in the shoulders, head and neck? Choices: - disturbances - fever - pollution - headache A:
Answer:
headache