like 6-7month ago i started to jerk of like 4 times a day,everyday. i think sometimes it was even more. usually i started in the morning in the shower, trying to cum 2-3 times in a row (takes about 15min), another time after lunch, maybe another time in the evening if i didnt have sex with my girl. so, after like 3-4 month of this routine i started to get problems with my right arm. it fell asleep all the time during the day at work, even at night and it whouldnt wake up in the morning for a few hours.
i dont think it was too much but it maybe was too much. i dont jerk off as much anymore since fucking my girl is better anyway and i dont want to loose my arm because of jacking off.
edit: if your dick is swollen often it probably is too much.