hard swollen lymph nodes the size of a fingertip with a cold for about 4 weeks.

I would definitely consult with your doctor, experienced a very similar situation however my swollen lymph nodes were located under my armpit and behind my jaw and neck. I ended up having a severe case of Epstein-Barr virus (EBV) nearly a year-and-a-half since diagnosis the size of my lymph nodes has fluctuated and I have undergone multiple Trials of blood work chest x-rays and ultrasounds all of which came back clear. I found my biggest problem was worrying too much, obviously that's not the case for everyone however I am very health conscious but not overboard: I smoke cannabis daily and drink often (obviously not recommended for anyone undergoing any sort of immune issue), Besides that I am a successful and actively fit young adult. Again consult your doctor and take the proper steps of getting checked out. It's worth the peace of mind. Best of luck and keep us posted!

Swollen lymph nodes doesn't automatically mean cancer. There are several causes of swollen lymph nodes. Glands can also swell following an injury, such as a cut or bite, near the gland or when a tumor or infection occurs in the mouth, head, or neck. Glands in the armpit (axillary lymph nodes) may swell from an injury or infection to the arm or hand. A rare cause of axillary swelling may be breast cancer or lymphoma.. Lymph nodes play an important part in the body's defense against infection. Swelling might occur even if the infection is trivial or not apparent. Swelling of lymph nodes generally results from localized or systemic infection, abscess formation, or malignancy. Common areas where the lymph nodes can be felt include the groin area, armpit, the neck, under the jaw and chin, behind the ears, and below the occiput (prominence on the back of the head). As a rule, when swelling appears suddenly and is painful, it is usually caused by injury or an infection. Enlargement that comes on gradually and painlessly may result from malignancy or tumor. Hope this helps!