Q: A Baker’s cyst occurs when fluid builds up in the back of the knee. This happens when something is wrong or injured inside the joint. However, this can also occur spontaneously without any trauma. Some people just get them and there is no known explanation. This cyst points to a larger underlying problem, like a torn meniscus, that needs to be found soon because the swelling can cause damage to the knee. Bursitis is inflammation or an injury to the prepatellar bursa. Bursa, a round, fluid-filled structure, help the kneecap move smoothly across other tissues without friction. If the bursa gets inflamed, it can cause surrounding tendons to become inflamed and pinched, resulting in pain.  Bursitis can cause stiffness or pain in the knee, as well as tenderness of the knee when touched and pain with movement. Pain is usually worsened by bending the knee and improved with extending the knee. The knee may also be swollen and red. Bursitis can be caused by repetitive motions, like bending or stooping. You can also get it by putting pressure on the joint by kneeling for too long on a hard surface. Patellar tendinitis occurs when you do the same motion on your knee, like running or cycling. Patellar tendinitis is when the tendon between your kneecap and shin becomes inflamed.  Pain is the main symptom of patellar tendinitis. The pain is located beneath your kneecap, near the place it attaches to your shin. The pain may surround a workout, either as you begin or after you finish one. Eventually, the pain will make it difficult to stand or take stairs. Arthritis of the knee occurs when the knee joint swells. Arthritis generally occurs with age or due to a knee injury. It can make everyday tasks difficult, like standing and sitting, walking, or taking stairs. Pain, swelling, and stiffness are common symptoms of arthritis of the knee.  Osteoarthritis (OA) occurs due to age. It can start around age 50, but may affect younger people. OA occurs due to the wear and aging of the cartilage of the knee, which causes less protection for the bones as they rub against one another. Pain may also become worse as you go through your day.  Rheumatoid arthritis (RA) is a chronic autoimmune disease that will not only affect the knee, but joints over the entire body.  RA usually starts affecting people between 50 to 75 years old, it is more common in women, and pain is often worse in the morning and improves with moving throughout the day.  Post traumatic arthritis occurs after a knee injury. Sometimes this happens years after the injury. Broken bones, ligament injuries, and meniscal damage can cause this type of arthritis.
A: Determine if you have a Baker’s cyst. Decide if you have bursitis. Monitor for tendinitis. Check to see if you have arthritis of the knee.

Q: This is a creative method for hiding a cut in the side, using Papier-mâché paste to seal the opening. If the papier-mâché ends up too thick, too weak, or too sticky, its presence will be obvious. This method is best used on letters that won't be carefully examined or heavily handled. You may also need plenty of time to adjust the papier-mâché seal. Hold it up to a bright light or window so you can see the shadow of the document inside. Take a mental note of its position and take care not to disturb the document inside. Using a pair of sharp, small scissors, snip off an absolutely tiny corner, preferably the bottom, while ensuring you do not snip the document. Cut along the crease of the side of the envelope, not removing any width but effectively opening your envelope. You can now read the document inside, or insert any materials you forgot to include in your mailing list. Mix white flour and water together to a fairly runny consistency. Test this on a spare piece of folded paper to see if it will stay stuck together once dried. Add more flour if necessary until the mixture dries strong in a thin layer. Boiling the flour-water paste will make the mixture dry clear instead of white or off-white, but will also make it weaker. Boiling is crucial for dark-colored envelopes to make the papier-mâché less obvious. Using a letter opener or some other smooth-edged instrument, spread the paper mâché paste to the edge of the cut in the envelope. Make sure not to get the document inside wet. Wait until fully dry. For a stronger seal, apply a second layer of papier-mâché paste. Repeat until there are no holes visible and the side stays stuck together. Work slowly to avoid scratching the envelope itself, especially if there is ink on the edge you're sanding. After the visible paste is removed, the envelope should look like an ordinary envelope that has never been opened.
A: Know the risks. Hold the envelope in front of the light. Cut the corner of the envelope. Slice open the short side of the envelope. Make a small amount of papier-mâché paste. Seal the cut with Papier-mâché once finished. Wait for it to dry and repeat if necessary. Using fine sandpaper, sand away the rough bits of paste from your envelope.

Q: Unlike most file types, DAT files can be created by virtually any program; as such, you'll need to know which program created the DAT file to figure out which program to use to open it. If you don't know which program was used to create the DAT file, you'll need to figure out which program to use before you can open the DAT file. Click or double-click the app icon of the program that was used to create the DAT file. Click and drag the DAT file onto the program's window to do so. Since your Mac usually won't view the DAT file as readable, you can't typically open the DAT file by using the File > Open menu in your selected program. This will attempt to open the DAT file in your program. In some cases, you'll receive a warning that the file's contents don't match its file extension (or similar). If so, click Yes or Open to prompt the DAT file to open. For example, opening an Excel-created DAT file in Excel may result in a prompt warning you that the file may be corrupted. You can click Yes to open the file anyway. If you want to avoid having to drag the DAT file into its program every time you want to open it, you can change the file's extension. Keep in mind that you must know the exact extension used for the DAT file, as changing the extension to use even a slightly different format (e.g., MP4 instead of AVI) can result in the file breaking:  Select the DAT file. Click File, then click Get Info in the drop-down menu. Click the triangle next to the "Name & Extension" category. Uncheck the "Hide extension" box if necessary. Replace the dat extension with your file's extension in the file's current name. Press ⏎ Return, then click Use .extension when prompted (e.g., for an XLSX document, you would click Use .xlsx here).
A:
Determine the program that created the DAT file. Open the program. Drag the DAT file into the program's window. Drop the DAT file. Confirm that you want to view the file if prompted. Change the DAT file's extension if necessary.