Hello
Welcome to healthcaremagic
as your query regarding Sexual problems
1. as your penis length is 4.9 inches while erection, it on and average length, and its really sufficient to make a female partner satisfied. although if you want to make it increase, there is not any home remedies known for that.
You can use the following oils as local application.
1. Kamna Oil Or K7 Gold Oil
2. skin problem is not related to handpractise habit only. but its due to hormonal changes in body and for that it needed to make blood purification by the following medicines of ayurveda.
1. Manjisthadi ghan vati 2 tabs twice a day
2. Kishor gugal 2 tabs twice a day
3. Vasa ghan vati 2 tabs twice a day.

Haldi and neem should have to take regular as home remedies.

Regards,
Dr. Nikul Patel
Ayurevda Consutant
lifecareayurveda@gmail.com

Hallo ,Mr.
You are not mentioned your age. The size of erect penises show that little more than 5 inches long.
But more mens average 3.5 to 3.9 inches when erect. Your organ size is 4.9 inches. It is enough size to enjoy yourself.
If you are not satisfied with the size of your penis,you can use some Herbal products for enhancement like VIAGRA , VIGRX PLUS etc. These pills works by stimulating peripheral tissue vasodilatation for enhanced arterial erectile function.
Acne and pimples are not cause of hand practice, It is purely inbalance of Hormones in the body.
Use MUSTARD OIL for external application.

1. since the sensation in Vaginal wall is only upto 2 inches, thus even 2" is enough.
2. by making an attempt to increase the penis size, you are at risk of losing sensation in the peripheral nerves, i.e. difficulty in ejaculation, scarring, or Impotency.
3. hand Practice (Masturbation) is not harmful instead it helps in preventing problem of night fall.
4. sometimes lax vagina also make feel the partner that his penis is small in size.
5. instead of size of penis,concentrate on good quality sperm count.
6. size will effect more psychologically than Physically
7. be confident and stay healthy