Can using wireless laptops cause headaches, brain tumors or other problems?

No data. There are controversial studies suggesting that use of cell phones can cause brain tumors. This is not conclusive. There are other studies suggesting that living close to power lines can increase the risk of brain tumors. This too is controversial. There are no data to suggest that wifi laptops cause headaches and tumors. Pain can occur from the strain to the neck and eyes with prolonged use.