I woke up with a huge oblong 3 inches long inch wide hard knot on my upper inner thigh about an inch below groin area. its painful when walking there is swelling and the area is red. Could this be my lymph nodes or maybe a boil? There is no form of a pimple shape or a head and it is rather large.
It sounds like it might be the beginnings of a boil, or cellulitis (skin infection). Probably not the lymph nodes. You need to see a doctor promptly and get it checked. You might need antibiotics or have to have it Chat Doctor.  Hope this answers your query.