Red parallel lines on upper arm

Hello naruto,

You may have blood vessel problems and they may be collapsing.  This can happen with veins that have weakened walls or internal damage of some type.  These parallel lines sometimes can appear while you are sleeping particularly if you lay on the body part.  You might try sleeping on your back for a while and let your arm see if it can heal itself.  You might consider going to the doctor and have your vasculature looked at to get a proper diagnosis.   Sometimes this phenomena is linked to deep vein thrombosis which can be very serious.  The next time you go for a physical make sure to ask you doctor to pay attention to your cardiovascular system.  It helps to catch these things early.