Big or small?
Usually lymph nodes will be mildly tender to the touch and firm, smooth and slightly moveable or fixed.
They can be 1-2 com in size or rarely larger. They may feel like a bean or grape under the skin.
Herniae on the other hand may feel like a sac of fluid or gas and may reduce (disappear) when you lay down or push on them. They tend to be associated with abdominal symptoms when symptomatic.