Brief Answer:
Betadine

Detailed Answer:
Hi.
Thanks for your query and the clear picture.
The pictures clearly show that your have multiple sebaceous cysts and ideally need surgery to get them excised.
You may please apply Solution Povidone Iodine (Betadine) after bath to keep the area sterile.

I hope this answers your query, please feel free to ask for further relevant queries if you feel that there is a gap of communication.

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Brief Answer:
There is no proven cream to cure.

Detailed Answer:
Thanks for your follow-up.
I am sorry to say that there is no proven cream that can cure such big sebaceous cysts on the scrotum. Betadine will help to avoid the secondary infection and the complications thereupon.
Occasionally these may open and heal on its own.
The small ones may get reabsorbed by your body.
Please consult your General Surgeon for proper care.

I hope this answer helps you, please feel free to ask for further relevant queries.

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Brief Answer:
As explained below.

Detailed Answer:
To assist your further:
1. How much time surgery takes
> Surgery would take 15 to 35 minutes.

2. How much time rest needed in hospital
> No need to rest in the hospital, you may please go home after half an hour if done under local anesthesia.

3. Which speciality doctor i need to contact
> General Surgeon.

4. Can hot water bag can cure this ?
No, it will not.
5. Long time betadine use can cure this ?
> No it does not cure, it helps to avoid secondry infectioin which is so common in this area.

6. Is it necessary to remove this ? Or we can stay with this ?
> Removal ensure no further complications like secondary infection and formation of non-healing ulcers.

7. Is it major surgery or just minor cut and drain ?
> Minor Surgery.
It is incision and excision of the cyst in toto.

8. Inside it is filled with what whether blood ? Inside is filled with concentrated sebum.

I hope this answer helps you.

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