Hi, Welcome to health care magic, This yellowish thick discharge from penis could be balanitis or balanoposthitis (infection of glans penis) or it may be due to excess smegma deposition. But the clinical examination would be helpful for me to diagnose and rule out chances of STD or any other disease. So,the important thing is to diagnose it first by a clinical examination by a general surgeon by doing inspection and palpation. The following treatment would be helpful. 1) Hot Sitz bath- Sit for 15-- 20 minutes and also clean off any clear or whitish secretion. Do it at least twice a day. So be sure to deal with it as part of your daily hygiene. One should wash it daily while bathing just retracting his foreskin downwards and by rinsing with clean shower water .It will remove the excess smegma, leaving a healthy, natural, micro thin layer of this beneficial product to keep the glans moist and sensitive. 2. Local Steroid cream/ointment application- Clean off and wipe off the area clean and dry,following which apply local steroid ointment like betamethasone. The infection should start subsiding after 3 to 4 of Ointment application. 3. You can be given oral antibiotics like cephalosporins (cefadroxyl or cefixime) or quinolones or macrolides but only after complete clinical examination. Hope this information will be helpful to you and consult dermatologist for further advise. Regards, Dr.SandipKabra