He's perfectly fine :) the only other reason I could think of is that he may be stressed out if you tried to pick her up or getting to close to hI'm but other than that he looks great.
I've had her for about 6 months but idk how old she is I think she's about 7 or 8 months when I bought her she was 4 inches and now she's 7 or maby 8 and then I've had my male for about 1 month just showing you guys