 [ Symptoms ] what are all the treatment options for straightening a penis that has been bent in an angle due to tight underwear  19 year old had a perfectly natural straight penis with an upward curve like a perfect banana in childhood up until puberty used to wear tight underwear and slept in a certain way putting penis in between legs with erection until morning penis no longer curves upwards but now curves downwards and to the right when i am excited penis gets very hard especially glans and the shaft turns into an hourglass figure which feels good & goes away after full erection penis does not hurt at all [ Disease ] this is quite common it is most likely due to an allergic like reaction during exercise during exercise histamines are released and some people are sensitive to them people sensitive to histamines can experience rashes itching and other allergic symptoms during exercise most of the time the rashes appear on the chest and thighs but can be on the arms or neck too sometimes exercise also reacts with food allergies or medications e g antibiotics pain medications sedatives tranquilizers and diuretics to cause the problem if the problem is bothering you so much that you can not stand it and it does not go away during the exercise session it may just pass if you continue then you should ask your doctor about using a topical ointment to stop the itching or taking an over the counter anti histamine like benadryl 30 60 minutes before exercising if over the counter anti histamines make you sleepy your doctor can prescribe a non sedative anti histamine you should only take over the counter or prescription medication for this problem after speaking with your doctor