By the time the to you have noticed the signs of water damage it has probably already been there for a while. Consider a water damaged ceiling. Water could have been reaching the backside of the drywall from a roof leak, but a slow drip can take a while to penetrate. When water penetration through the drywall occurs, this is one in you will begin to notice brown staining and water rings. Sometimes this water penetration will gravitate towards a light fixture in the ceiling or in the corners of a ceiling. By the time you notice water damage on the ceilings inside a running, there is likely to be water damage in the attic and roof as well.
If you know that you have some of this damage because you see these types of spots, try to the repairs to the ceiling and roof done as soon as possible. It will not do very much good to repair the ceiling without first repairing the roof leak. The best way to check this is to get up on your roof and check to see if you have some loose or damaged tiles or shingles any where near the damaged ceiling. It does not necessarily have to be right on top of the damage because the water can run in one direction or another. If you do find some of these places you will most likely also be able to see evidence in the attic. When it is raining steadily is a good time to go into the attic and look for leaks.
With any kind of serious water damage, it is not a good idea to try to fix it yourself. You will most likely end up with a job that is going to take a lot of time, experience, and probably money to fix. You should always leave these kinds of jobs for the professionals. They will know what has to be done. They will be able to do the whole job in a lot less time than it would take you. A licensed water damage company is usually the best choice to get a water damage issue repaired quickly and efficiently.
It is important to know that the water damage company that you engage is licensed, experienced, and insured themselves. If you are not sure which company is best for you to use, you might leave it to your insurance company to find someone reputable for you. Make sure that your home is inspected for mold as well while the company is there. Water damage often causes mold and it can travel and spread to others areas in the home if there is sufficient, warmth, water, and food for it to grow.