My 4 year old son has had daily headaches for the past three days. what could be causing this? no fever or any other symptoms just a strong pain. he points to his forehead and covers his eyes. the first time he even said he couldn't see.

Virus or vision: Hi, Oscar. Like most symptoms in kids, the tincture of time is critical. Daily headache for 3 days could be something as simple as a virus (any number of viruses cause nonspecific symptoms like headaches), sinus congestion, or even be a vision problem (like he needs glasses). Give it time to declare itself and if he's still having daily headaches in 2 weeks take him in to the doctor.