Localized itching is not usually a sign of either acne or systemic disease. As often as not, it's a sign of stress, such as the stress of worrying whether you have lymphoma or something similar. Please show your internist the lymph gland, and I'm confident you'll get the reassurance you need. Treat the itch with any over-the-counter preparation containing menthol or camphor. As for the acne, you might want to ask a dermatologist about that.
Take care.
Dr. Rockoff