Red tender nodules on her shin could be erythema nodosum; Erythema nodosum is a type of panniculitis, i.e. an inflammatory disorder affecting subcutaneous fat.Oral contraceptives which this newly married woman would take is likely hereOther causes are Neutrophilic dermatoses (Behcet's disease, Sweet's syndrome), iodides, bromides, sulfonamides, Sarcoidosis, Ulcerative colitis(also Crohn&;s), Streptococcus, Pregnancy, and Malignancy