I have a hard lump in my groin/thigh area should i be concerned

Yes but...: You can't know what it is until you get checked. May just be inflammation, but more serious things can be present as well. Check with your pcp or a surgeon for a checkup. Good luck.

Need to examine: It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. It would be prudent to see your doctor, Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/.