masturbation problem?

it only has to do with how often you do it
see every time you get an erection the veins, arteries, and capillaries on your penis dilate( stretch in other words) and get filled with blood, after you lose you erection all that blood leaves the penis but the veins and all that still stretch and need time to go back to their normal size, but if you get another erection before they go back to their normal size you are kinda overstretching them and that can cause some pain afterward
just try to do it less often and then pain should soon go away

once a day is enough, too much masturbation can cause a strain. So try to masturbate only once a day that is what i do.

it appears that you have Penial Invererectus B, or in other words, your genitals are going to fall off, if you continue to masturbate.

Did you use shampoo? Oh lawd, shampoo is terrible. And you're probably doing it too much. Save it for 4 or 5 days then it'll be like Old Geezer Geyser. :D

Give yourself a break if two to three days. You'll get better. 

your hand has a greater grip than a girls vagina by far. Anyways if you do it with a girl 3X a day it'll hurt too.

Go see a urologist, they not only work on the urological system of both sexes but they also treat sexual health issues, so go talk to a urologist,you will not be the first male to tell him about your sexual health and what you do and how your junque is to be treaed

Three times a week is unhealthy, let alone three a day. the pain your having has to do with an overload or overuse. what your literally doing is clogging your shaft with excess sperm.