It sounds like you may be experiencing a condition called phimosis, where the foreskin is too tight to retract, which can be worsened by diabetes and may cause white patches due to dryness or irritation.

🩺 Symptoms

• Tight, non-retractable foreskin with thickening at the tip
• White patches appearing after the skin is dry for several hours
• Discomfort or difficulty during intimate moments

⚕️ Possible Causes

• Phimosis, often linked to chronic inflammation or scarring
• Diabetes can increase risk of infections and skin changes, contributing to tightness and white patches
• Dryness and irritation from poor hygiene or fungal infections

🏥 Self-Care and Next Steps

• Keep the area clean and dry, avoid harsh soaps
• Gentle daily retraction exercises if tolerable, but do not force
• Use prescribed topical treatments like mild steroid ointments under doctor supervision to reduce tightness and inflammation
• Manage blood sugar levels well to reduce infection risk

⚠️ When to See a Doctor

• If pain, swelling, or discharge develops
• If white patches worsen or spread
• If you cannot urinate properly or have recurrent infections

Consult a urologist for a thorough evaluation and personalized treatment plan, which may include topical medications or, in some cases, minor surgical options. Proper diabetes control is also important to improve skin health in this area.