Mary, Welcome home! Glad to see you back online. I wonder about a couple of things. If baby has a receding chin and is sucking in his lower lip, he may be keeping his tongue behind his lower gum. His gums could be causing the red mark. I think it may be difficult to correct the poor suckling after 2 months, but putting baby in a sitting up position and being persistent in tucking out his lower lip should help. Check under the baby's tongue. If he has a short or tight frenulum, he may not be able to get his tongue out over his lower gum. That may also be a factor. I wonder if the red mark could be from muscle spasm, tho we usually think of a blanching, whiteness in relation to that. The pain you describe sounds excruciating. Let us know how things work out. Jeanne Fisher Austin, TX