For comfort and to reduce sweating and friction, it is preferable to sleep in a T-shirt with breathable cotton underwear only, rather than joggers over underwear. Keep the area clean and dry, use loose, moisture-wicking clothing during the day, and consider an antifungal dusting powder if excessive sweating causes recurrent rashes. Night-time erections and pre-ejaculate are normal. If redness, itching, pain, or rash persists, consult a dermatologist or urologist.

Your choice, but clothes should be cotton and comfortably fitting,  not tight.

kindly do connect and consult with me for better treatment plan and advice on your case via PRACTO app

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For your situation, sleeping in just the underwear (without the joggers) is the better choice. The scrotal area sweats naturally and the key to preventing redness and chafing is to keep it dry with good airflow. Adding joggers on top creates an extra layer of heat, friction, and moisture, which worsens the sweating and rubbing. Just wearing the trunk-style underwear alone will be cooler, reduce friction, and help keep the area drier through the night. To address the existing redness and chafing from rubbing, make sure the area is clean and dry before sleeping, and you can apply a small amount of plain petroleum jelly or a soothing barrier cream to the affected area to reduce friction.

Underwear is good option .because you have excessive sweating ,so better if you keep the area dry.

Need a few more details please consult for further evaluation and treatment

Avoid fried and spicy food Water intake more Green leafy vegetables more Fiber meal Walk Do connect and consult Will help you

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Can help you, kindly consult and provide detailed history for proper diagnosis and further management