Bump in knee when folded

[Devote999]

When I fold my left feet, I feel a bump on the inner side of the knee. When the foot is stretched I cant see the bump. I did not find it earlier. It must have developed in last few months. It surely was not there. Or at least it did not pained earlier. Even now it does not pain much. Occasionally and very slightly. But it pains (again not too much) when I fold my knee fully. So I avoid folding my left feet fully. I can walk and run well (though now a days I avoid running and do so carefully, not too fast). Also most of the time I use knee cap too.

I shown this to orthopedic. He concluded it as medial tissue swelling (if I read his hand writting correctly). In prescribed Signoflam tablet (http://www.khemist.in/signoflam-500mg-tablet.html) and RANTAC 150 (http://retailpharmaindia.com/product/rantac-150-tablet-30-tabs/). And an oil. After the course I dont see much difference. The doctor asked to keep doing the exercise and said there is no much harm, the swelling may stay but it should not be much harmful. Also I took xray. It did not show any fracture / disformity in xray.

I feel this is not swelling but somehow my knee bone is protruding when I bend my foot as it feels very hard (cant press it) to consider as swollen muscle.

I have attached photo from different angles. Please advice me.
1. If it will grow?
2. Will it ever go normal?
3. What it can be?
4. What care should I take?

[Devote999]

Super thanks a lot doc...that was very satisfying.

[KaleemMohdBPT]

Hi...Devote999
i think it looks like baker's cyst (consult a physician)
A Baker's cyst is a pocket of fluid that forms a lump behind the knee. It is also called a popliteal cyst. See a picture of a Baker's cyst.
Baker's cyst?
A Baker's cyst is caused when excess joint fluid is pushed into one of the small sacs of tissue behind the knee. When this sac fills with fluid and bulges out, it is called a cyst. The excess fluid is usually caused by conditions such as rheumatoid arthritis or osteoarthritis that irritate the knee. It may also be caused by an injury.
symptoms?
Often a Baker's cyst causes no pain. When symptoms occur, they may include:
Tightness or stiffness behind the knee.
Swelling behind the knee that may get worse when you stand.
Slight pain behind the knee and into the upper calf. You are most likely to feel this when you bend your knee or straighten it all the way.
Sometimes the pocket of fluid behind the knee can tear open and drain into the tissues of the lower leg. This can cause swelling and redness in that part of the leg.
diagnosis?
Your doctor will examine your knee and ask you questions about your past health and when the pain and swelling started. Your doctor may order tests, such as an MRI, to see a picture of the inside of your knee.
treatment?
A Baker's cyst may go away on its own.
If arthritis or another problem is causing the Baker's cyst, your doctor may treat that problem. This usually makes the pain and swelling of a Baker's cyst go away.
If a cyst does not go away, or if it is causing a lot of pain, your doctor may drain the fluid with a needle. You also may be given a shot of steroid medicine to reduce swelling. You may need to use a cane or crutch and wrap your knee in an elastic bandage. In rare cases, a Baker's cyst is removed by surgery.
There are things you can do at home to help you feel better.
Rest your knee as much as you can.
Take over-the-counter medicines to reduce pain and swelling. These include ibuprofen (Advil, Motrin) and naproxen (Aleve).
Use a cane, crutch, walker, or another device if you need help to get around. These can help rest your knee.
If you wear an elastic bandage around your knee, make sure it is snug but not so tight that your leg is numb, tingles, or swells below the bandage. Loosen the bandage if it is too tight.
Follow your doctor's instructions about how much weight you can put on your knee.
Stay at a healthy weight. Being overweight puts extra strain on your knee.