My husband had a light concussion yesterday. Today he has a mild headache. Can he take ibuprofen for the headache?

Rest. After a concussion it is best to rest the brain. Avoid tv, computer time, and even reading. Simply rest the brain. Ease back into activities only when feeling better. Acetaminophen might be better than Ibuprofen for pain due to increased risk of bleeding with ibuprofen. If the headache is worsening, he has blurred vision, mental status changes, dizziness, or other concerns he should be seen by dr.
See a doctor. He should be evaluated by a primary care doctor or neurologist. An MRI might be ordered depending on his examination and history. If symptoms worsen or he develops double vision, nausea, dizziness, increased sleepiness or other neurological symptoms then go to the er asap.