Red light does not cause damage to the scalp. There are no side effects if you wear the helmet for a few minutes longer.
If the foam pads are uncomfortable, we suggest adjusting them on your helmet to a more comfortable position. The indents you might experience are natural when something sits on the skin for too long and the marks are temporary.
It is similar to someone wearing a sock that is too tight and might leave a red mark for a few hours but eventually goes away.
The redness usually means that your scalp is not used to the helmet sitting on it. It will get better over time.