Lump and ache pain behind knee. Bakers cyst or tumor or varicose vein?

Depends. Least likely cause is the bakers cyst as these are usually asymptomatic. The only way that a varicose vein could be felt as a lump is if it has clotted off in which case it usually would also be very painful. Therefore this could be a thrombosed varicose vein. Possibility of tumor can not be discounted as it is included in the differential.
Knee problems. The vast majority of aches and pains in the back of the knee is from the knee itself. Most commonly, it reflects tendinitis of the hamstring muscles, which is extremely common with quad muscle weakness in the setting of a knee injury. The other common source is meniscus injury or cartilage injury. A baker's cyst is a reflection of such knee problems and is often the source of fullness or a lump.

Related Questions

I hav varicose vein behind knee, in this place under the skin I can feel pea size lump, not protruding. Vein not painful. Tumor or blood clot?

Experienced hands. If something can be felt but not seen then often a clinician can determine the most likely diagnosis by palpating the area in physical exam. Superficial blood clots or varicosities are easily palpated, but more serious deep venous thrombosis usually are not. Cysts, lymph nodes, and a variety of skin nodules can be found behind the knee too.

I have a lump behind my knee and my doctor says its a bakers cyst, but I have pain radiating up my calf and slo down to my foot. Could it be a clot?

Calf pain. Baker cyst & DVT (blood clot) is diagnosed by ultrasound. Baker rarely needs surgery. Treatment is with oral pain meds (motrin, tylenol). Sometimes phy therapy. May help. Pain may radiate to calf (specially if rupture). Ortho if very large or very painful (in order to find cause - ie cartilage damage, infection etc), they may consider drainage & rarely surgery. Good prognosis.

Aching behind knees at night. Have a superficial varicose vein. Could that be causing it? Worried it may be PAD, and I'm about to start oral BC.

See Vein Specialist. It is very unlikely that you would have PAD at 25 years old. The varicose vein may be a source of your problem but because you have a vein does not mean that it is causing problems. See a vein specialist for a venous evaluation before starting OBC pills.

I have a varicose vein in my leg, now ive discovered a pea sized lump (not movable) under my skin where the varicose vein is. Tumor?? so scared

Veins and lumps. Varicose veins are dilated veins...up to where you can feel them easily. This also allows you to feel the valves that are part of the veins normal structure. Pull up some pics of vein anatomy to reassure yourself.
Keep an eye on it. I would not worry about it right now. But do check it once weekly and monitor its size. Unless it grows bigger over the next 1-2 months, it is unlikely to be a serious matter. I suspect it is a small clot of blood which should subside in a month or two. If it does not get smaller or if it grows bigger, get it checked by your doctor..

Pain behind knee bakers cyst will it go away with massage?

Possibly. The fluid that accumulates is painful because of the pressure. The joint capsule if weak, can burst, then you get pain into your calves. Be sure your DX is baker's cyst. U/s can confirm. See your dr! Treatment consists of aspiration, possibly injecting a healing agent, but especially treating the underlying condition. See you dr!

Can you get knee pain with varicose veins yes or no?

No. Extremely unlikely. Varicose vein discomfort is usually aching and heaviness along the side of the leg. Knee pain may be arthritis or nerve irritation.
No. Your actual knee joint should not hurt. The veins can hurt. The muscles can hurt. The joint should not. Elevate your leg. If the knee still hurts after a minute, it's your knee, not the veins.
Not likely. Varicose veins usually cause focal discomfort at the site of the visible veins or a diffuse leg discomfort below the knee. If you had a large cluster of veins adjacent to your knee then it might cause some pain in that local area. Pain within the knee joint area is more likely related to the joint, muscles, ligaments, or tendons. A ruptured Baker's cyst is another possibility. You might need MRI.