Flow Issues

I have great water pressure and flow outside of my home. Inside I have low water pressure and flow. When I turn a faucet on inside I get a blast of good pressure and flow for about 2 seconds then it slowly dies off. Using two faucets at one time brings the flow and pressure to 0. I have a well system in a home ~10 years old. TIA

If you have any filters or other water treatment equipment, by-pass them and see if the problem goes away. If so then put one thing back in service at a time and check until you find where the problem returns. Then fix that item. If there is no improvement, then you have a valve partially closed or broken etc. or, there is a blockage in the main line somewhere on the house side of the pressure tank.

Thanks for the info. I found a valve in the wall on the first floor. I turned it in the open direction because it was not fully opened. I then closed it and opened it a few times. Then a closed and opened a few times with some faucets on inside. Now my water pressure is pretty good all around. The bathrooms have great flow/pressure. One kitchen has adequate pressure, another kitchen, unused, has 0-low pressure. I think I had the kitchen with 0-low pressure on when I was playing with the valve to see if it did anything. I found some granules of greenish color in the faucet screen. Is there anything I can add to the well feed line that would clean out any build up? TIA

Take off the faucet tip aerators and clean them without losing any parts. The green is copper coming out of the copper tubing. It stains little pieces of hardness scale. That means copper is being added to your water.... not a good thing and it could lead to pinhole leaks and water damage. Possibly you have low pH acidic or otherwise corrosive water. Other causes are numerous, they are electrical grounds on water lines, inadequate build ground, high TDS, DO, CO2 content, chlorides, hot water recirculation systems and bacteria.