What enlarges lymph nodes on side of neck?

Many things. Lymph node enlargement (lymphadenopathy) may occur due to a large variety of factors like infections (bacterial, viral or fungal), immune disorders, drug reactions or malignancy (lymphomas, carcinomas). Correlation with your clinical history and a biopsy usually helps in further characterization.
Monitoring Centers. Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.

Related Questions

Can lymph nodes swell for no reason on one side of neck??

Very true! It can be very common to see the lymph nodes swell in the neck in one or more if something stimulates the immune system such as in the throat , teeth, or even the face area. If an area gets inflamed then it can cause the lymph nodes to react to that response to protect your body from invasion by bacteria. Of course you need to watch it and check if persists or gets much worse. Hope this helps! Read more...

Can it be normal to be able to feel lymph nodes in side of neck? If so, is appx pea size normal?

Yes. It is normal to be able to feel lymph nodes and pea size is normal. You may note enlargment/pain in context of infection with slow return to typical size. The size/texture should be symmetric most of the time. Read more...

If two different specialists found lymph nodes in right side of neck to feel hard but ultrasound showed nothing, what else could cause?

Probably normal. Small lymph nodes often can be felt in entirely healthy people. Usually they are just a bit prominent after some distant past inflammation. The absence of significantly enlarged lymph nodes by ultrasound is reassuring and probably means nothing is abnormal. To be sure, check the specialist who recommended the ultrasound. Read more...

Ever since I pushed on lymph nodes under left side of neck I've kept gettin feelings of passing out but never do (several months) I know my heart is ok?

The lymph nodes you. are indicating are close to the carotid body on that side. This is the blood pressure and heart rate regulator. When you push on that you will slow your heart and drop your blood pressure. Do it long enough or hard enough and you WILL pass out. Potentially you still have some swelling there that is stimulating the area. Ask your health care provider to examine you and determine this. Read more...

About a year ago. I was diagnosed otitis media and noticed painful lymph nodes in side of neck. Now, I can still feel them. But painless. Wory or no?

Get examined. Impossible to diagnose a palpable finding on an exam without haveing the examination reproduced. Please go see s trusted doctor to look into your ear as well for the results and treatment. Read more...
Unlikely. the nodes are probably a bit scarred and thickened. May reduce over time. If enlarging or painful need checked. Read more...

I'm sore under ribs (10th). done nothing to hurt myself. Also sore in my lymph nodes in the left side of neck. Any idea what it could be?

Wait And See. Ya know, it may be nothing- and if it is, it'll probably all go away in a few days, but if either or both (the pain or nodes) persist over a week or two or get worse before then, then best for you to see a doc about it. Other than that, best not to worry too much about it unless, in two weeks, it hasn't gone away or gets worse. Read more...