See, you are falling (or being pushed, by your faculty who really should know better, and you can tell her I said so) into the classic nursing student trap of trying desperately to find a nursing diagnosis for a medical diagnosis or hypothetical situation (tanning bed use? really??) without really looking at your assignment as a nursing assignment. You are not being asked to find an auxiliary medical diagnosis-- nursing diagnoses are not dependent on medical ones. You are not being asked to supplement the medical plan of care-- you are being asked to develop your skills to determine a nursing plan of care. This is complementary but not dependent on the medical diagnosis or plan of care. At the moment you don't even have a medical diagnosis to work with, let alone an actual patient condition. Therefore you do not have enough information to make a nursing diagnosis (yes, nsg dx are made from assessment, not pulled off a list).
You are responsible for some (not all) of the components of the medical plan of care but that is not all you are responsible for. You are responsible for looking at your patient as a person who requires nursing expertise, expertise in nursing care, a wholly different scientific field with a wholly separate body of knowledge about assessment and diagnosis and treatment in it. That's where nursing assessment and subsequent diagnosis and treatment plan comes in.
This is one of the hardest things for students to learn-- how to think like a nurse, and not like a physician appendage. Some people never do move beyond including things like "assess/monitor give meds and IVs as ordered," and they completely miss the point of nursing its own self. I know it's hard to wrap your head around when so much of what we have to know overlaps the medical diagnostic process and the medical treatment plan, and that's why nursing is so critically important to patients.
You wouldn't think much of a doc who came into the exam room on your first visit ever and announced, "You've got leukemia. We'll start you on chemo. Now, let's draw some blood." Facts first, diagnosis second, plan of care next. This works for medical assessment and diagnosis and plan of care, and for nursing assessment, diagnosis, and plan of care. Don't say, "This is the patient's medical diagnosis and I need a nursing diagnosis," it doesn't work like that.
There is no magic list of medical diagnoses from which you can derive nursing diagnoses. There is no one from column A, one from column B list out there. Nursing diagnosis does NOT result from medical diagnosis, period. This is one of the most difficult concepts for some nursing students to incorporate into their understanding of what nursing is, which is why I strive to think of multiple ways to say it. Yes, nursing is legally obligated to implement some aspects of the medical plan of care. (Other disciplines may implement other parts, like radiology, or therapy, or ...) That is not to say that everything nursing assesses, is, and does is part of the medical plan of care. It is not. That's where nursing dx comes in.
A nursing diagnosis statement translated into regular English goes something like this: "I think my patient has ____(nursing diagnosis)_____ . I know this because I see/assessed/found in the chart (as evidenced by) __(defining characteristics) ________________. He has this because he has ___(related factor(s))__."
"Related to" means "caused by," not something else. In many nursing diagnoses it is perfectly acceptable to use a medical diagnosis as a causative factor. For example, "acute pain" includes as related factors "Injury agents: e.g. (which means, "for example") biological, chemical, physical, psychological."
To make a nursing diagnosis, you must be able to demonstrate at least one "defining characteristic" and related factor. Defining characteristics and related factors for all approved nursing diagnoses are found in the NANDA-I 2012-2014 (current edition). $29 paperback, $23 for your Kindle at Amazon, free 2-day delivery for students. NEVER make an error about this again---and, as a bonus, be able to defend appropriate use of medical diagnoses as related factors to your faculty. Won't they be surprised!
If you do not have the NANDA-I 2012-2014, you are cheating yourself out of the best reference for this you could have. I don’t care if your faculty forgot to put it on the reading list. Get it now. When you get it out of the box, first put little sticky tabs on the sections:
1, health promotion (teaching, immunization....)
2, nutrition (ingestion, metabolism, hydration....)
3, elimination and exchange (this is where you'll find bowel, bladder, renal, pulmonary...)
4, activity and rest (sleep, activity/exercise, cardiovascular and pulmonary tolerance, self-care and neglect...)
5, perception and cognition (attention, orientation, cognition, communication...)
6, self-perception (hopelessness, loneliness, self-esteem, body image...)
7, role (family relationships, parenting, social interaction...)
8, sexuality (dysfunction, ineffective pattern, reproduction, childbearing process, maternal-fetal dyad...)
9, coping and stress (post-trauma responses, coping responses, anxiety, denial, grief, powerlessness, sorrow...)
10, life principles (hope, spiritual, decisional conflict, nonadherence...)
11, safety (this is where you'll find your wound stuff, shock, infection, tissue integrity, dry eye, positioning injury, SIDS, trauma, violence, self mutilization...)
12, comfort (physical, environmental, social...)
13, growth and development (disproportionate, delayed...)
Now, if you are ever again tempted to make a diagnosis first and cram facts into it second, at least go to the section where you think your diagnosis may lie and look at the table of contents at the beginning of it. Something look tempting? Look it up and see if the defining characteristics match your assessment findings. If so... there's a match. If not... keep looking. Eventually you will find it easier to do it the other way round, but this is as good a way as any to start getting familiar with THE reference for the professional nurse.
All that said, I GUESS you could say that this hypothetical person using a tanning bed would be at Risk for Impaired Skin Integrity (at risk for alterations in epidermis and/or dermis), falling under Domain 11, Safety and Protection, Class 2, Physical Injury, this being related to an external factor, radiation. I leave it to you to think of two ways to decrease this risk.
I could also be tempted by "Risk Prone Health Behavior," Domain 1, Health Promotion, Class 2, Health Management, related to inadequate comprehension, as demonstrated by failure to take action that prevents health problems.
If you are an honest student you will get the book and read the rest of these-- it's less than half a page each, not arduous or arcane, and make up your mind as to how you will defend your choice to your professor. Won't she be surprised that you knew to look in the ONLY definitive book on nursing diagnosis. You'll get an A, and a leg up on your classmates.