Can sparring once a week give you minor brain damage?

[OctoberRed]

One punch placed well can give you brain damage, and without proper recovery time the damage builds.

Especially one good rabbit punch.

[Lomadeaux]

Are there any negative effects of sparring boxing once a week with headgear ?

Dude if you're asking this question, I'm assuming you want to box or are starting to. And if that's the case, stop boxing.

[dreamroom]

Once a week ain't bad. Twice a week is better. I wouldn't spar any more than twice a week, not counting drills. That's pretty standard. And yes, it can cause brain damage.